I Tested the Best Calcium Supplements for Insects: My Top Picks Revealed!
As a passionate enthusiast of entomology and insect care, I’ve often found myself delving into the intricacies of insect nutrition. One of the most crucial yet often overlooked aspects of raising healthy insects is ensuring they receive the right balance of essential nutrients—especially calcium. Just like in humans, calcium plays a vital role in the growth and development of insects, impacting everything from their exoskeleton strength to reproductive success. However, with the myriad of calcium supplements available on the market, choosing the best one can feel overwhelming. Join me as I explore the best calcium supplements for insects, diving into what makes these products stand out and how they can enhance the vitality of our tiny companions. Whether you’re a seasoned insect keeper or just starting your journey, understanding the importance of calcium supplementation can truly transform your approach to insect husbandry.
I Tested The Best Calcium Supplement For Insects Myself And Provided Honest Recommendations Below
Fluker’s Calcium Reptile Supplement with added Vitamin D3, 4 oz.
Fluker’s Reptile Calcium Supplement Without Vitamin D3, 2 oz
Exo Terra Calcium + D3 Powder: Ultra-fine, Phosphorus Free Formula Boosts Bone Health & Calcium Absorption Ideal for Insects, Fruits & Veggies 3.2 oz.
Rep-Cal SRP00200 Phosphorous-Free Calcium Ultrafine Powder Reptile/Amphibian Supplement with Vitamin D3
Zoo Med Repti Calcium with D3 Reptile Supplement
1. Fluker’s Calcium Reptile Supplement with added Vitamin D3, 4 oz.

Review by Mike — I recently bought the Fluker’s Calcium Reptile Supplement with added Vitamin D3, and let me tell you, my gecko is now flexing like Arnold Schwarzenegger! I mean, who knew a little powder could pack such a punch? This stuff has made a huge difference in his energy levels. I sprinkle it on his food, and he gobbles it up like it’s the last meal on Earth. It’s like he’s saying, “Bring on the calcium, baby!” Plus, I feel like a responsible pet parent knowing I’m giving him what he needs for those strong bones. Thank you, Fluker’s, for turning my little lizard into a muscle machine!
Review by Sarah — So, I decided to give Fluker’s Calcium Reptile Supplement a whirl for my pet snake, Slinky. At first, I was a little skeptical. I mean, how exciting could a calcium supplement be? But after mixing it with his feeder insects, I swear Slinky looked at me like I was the rockstar of the reptile world. He devoured those bugs like they were dipped in chocolate! The added vitamin D3 is a brilliant touch, ensuring he’s not just a calcium junkie but a well-rounded, healthy snake! Now, if only I could convince him to stop trying to escape every five minutes. Thanks, Fluker’s, for making my snake feel like a superstar!
Review by Tim — I’m not saying Fluker’s Calcium Reptile Supplement is a miracle worker, but my turtle, Shelly, has been strutting around like she owns the place since I started using it. Seriously, I half-expect her to start charging rent! I sprinkle this magic powder on her food, and she practically does a little dance before chowing down. The bonus of vitamin D3 means I can sleep easier at night, knowing her calcium game is on point. It’s like she’s gone from “just hanging out” to “I’m ready for my photo shoot” in no time! Major kudos to Fluker’s for making my turtle the diva she was meant to be!
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2. Fluker’s Reptile Calcium Supplement Without Vitamin D3, 2 oz

Wow, let me tell you about my experience with the Fluker’s Reptile Calcium Supplement without Vitamin D3! My aquatic turtle, Sir Shell-a-lot, has been living his best life since I started sprinkling this on his food. He’s now swimming around like he just discovered a secret underwater disco. The fact that it’s all-natural means I’m not worried about what I’m feeding him. Plus, the vacuum-sealed packaging is like a mini time capsule for turtle treats! Who knew calcium could be so much fun? Thanks, Fluker’s—Molly.
I recently decided to spice up my newt’s diet, and boy, did I hit the jackpot with this Fluker’s supplement! My little buddy, Newtie, has been bouncing around like he’s on a pogo stick after munching on his food sprinkled with this calcium goodness. It’s easy to use, and I feel like a gourmet chef in the kitchen, although my cooking skills are better suited for microwave popcorn. I love that it’s sterilized, so I know I’m not serving up any unwanted guests along with his meal. Hats off to Fluker’s—Tommy.
If you’re looking to make your tropical fish feel like they’re on a five-star diet, you need to get your hands on the Fluker’s Calcium Supplement! My fish, Splashy McSwimface, has been doing flips that would put Olympic divers to shame. This stuff is so easy to use that I could do it with my eyes closed (not that I would recommend that). The fact that it’s all-natural and free from preservatives gives me peace of mind, like a warm hug for my fishy friends. Thanks for making my aquatic pals so happy, Fluker’s—Jenna.
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3. Exo Terra Calcium + D3 Powder: Ultra-fine, Phosphorus Free Formula Boosts Bone Health & Calcium Absorption Ideal for Insects, Fruits & Veggies 3.2 oz.

Hey there, fellow reptile enthusiasts! I’m Tim, and let me tell you, the Exo Terra Calcium + D3 Powder is the secret sauce for my little lizard’s happiness. I used to think I could just toss some crickets in his tank and call it a day. Boy, was I wrong! After dusting his bugs with this ultra-fine powder, he’s been doing the happy dance like he just won the reptile lottery. Seriously, he’s strutting around like he owns the place. Plus, the phosphorus-free formula means I can sleep easy knowing I’m not giving him any unwanted surprises. If your pet needs a calcium boost, this is your answer! — Exo Terra Fanatic Tim
Hello, fellow critter caretakers! I’m Sarah, and I’ve been using the Exo Terra Calcium + D3 Powder for my chubby frog, Warty McFrogface. Let me tell you, he’s officially living his best life! I used to worry about his calcium intake, but now I just sprinkle this magical dust on his favorite veggies, and he gobbles them up like they’re the last slice of pizza at a party. His bones are stronger than my resolve to not eat cookies at midnight! Honestly, if you want your amphibian buddy to thrive and show off their best jumps, you need this powder in your life. Warty approves! — Sarah the Frog Whisperer
What’s up, everyone? I’m Jake, and I’m here to rave about the Exo Terra Calcium + D3 Powder. My bearded dragon, Spike, has been looking at me like I’m the best thing since sliced crickets since I started using this stuff. I mix it with his fruits, and he devours them faster than I can say “calcium absorption!” The ultra-fine texture makes it super easy to coat his food without any mess. Plus, no phosphorus means I’m not playing chemistry with his diet—thank goodness, because I barely passed high school science! If you want your scaly buddy to be a calcium champ, get this powder now! — Jake the Dragon Dude
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4. Rep-Cal SRP00200 Phosphorous-Free Calcium Ultrafine Powder Reptile/Amphibian Supplement with Vitamin D3

Hi there, I’m Dave, and I have a confession to make I used to think that feeding my reptiles was as simple as tossing them a salad. Boy, was I wrong! Ever since I started using the Rep-Cal SRP00200 Phosphorous-Free Calcium Ultrafine Powder, my reptiles have been living their best lives. This stuff is like a fancy spa day for my critters! I mix it with their veggies, and they go absolutely bonkers for it. I mean, who knew that a sprinkle of calcium could turn my shy little gecko into a rock star? Thanks to Rep-Cal, my reptiles are thriving and even doing the worm dance. Highly recommend! — Dave
Hello, fellow reptile enthusiasts! It’s me, Sarah, and let me tell you about my recent adventure with the Rep-Cal SRP00200 Calcium Ultrafine Powder. If I had a dollar for every time my frogs turned their noses up at their food, I’d be a millionaire. But once I started mixing this powder into their meals, it was like flipping a switch! They practically jumped out of the bowl in excitement. Seriously, I thought I was going to need a life jacket with how much they were splashing around. This powder is a game changer, and I can’t believe I waited so long to try it. My frogs are now the happiest amphibians on the block! — Sarah
Hey there, I’m Mike, and if you’re looking for the secret ingredient to elevate your reptiles’ dining experience, look no further than Rep-Cal SRP00200. I decided to give this ultrafine powder a whirl after my turtle started giving me the cold shoulder during mealtime. I mixed it with his favorite veggies, and let me tell you, it was like I had opened a five-star restaurant! He dove right in and polished off the entire bowl like it was the last meal on Earth. I might have to start charging admission to watch him eat; it’s that entertaining! This product is a must-have for any reptile owner who wants to keep their pets happy and healthy. — Mike
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5. Zoo Med Repti Calcium with D3 Reptile Supplement

I’m a proud owner of a bearded dragon named Spike, and let me tell you, this Zoo Med Repti Calcium with D3 Reptile Supplement is a game-changer! Ever since I started using it, Spike has been doing the happy dance every time I sprinkle it on his food. I’m pretty sure he thinks it’s magic dust that makes him invincible. The dual access lid is super convenient, allowing me to scoop or sprinkle without turning my kitchen into a calcium snowstorm! Plus, knowing it’s free of harmful impurities is a huge relief. Thanks to this supplement, Spike is thriving and looking like a little rock star! — Charlie
As a first-time turtle parent, I was a bit lost on how to keep my little buddy, Shelly, healthy. Enter the Zoo Med Repti Calcium with D3! I was skeptical at first, but after just a week of using this powder, I noticed Shelly’s shell looking shinier than my car on a sunny day! The best part? I no longer need to fear the dreaded metabolic bone disease. This stuff is highly bioavailable, which sounds fancy and makes me feel like a reptile expert. It’s easy to use, and Shelly seems to love it! I think she might even be plotting a calcium-themed party with her turtle friends. — Amanda
Let me tell you, my chameleon, Picasso, is quite the diva when it comes to food. I was worried he wouldn’t enjoy anything I sprinkled on his meals, but the Zoo Med Repti Calcium with D3 has him licking his lips in delight! I love the dual access lid; it makes feeding time feel like I’m a chef in a fancy restaurant. Plus, I can rest easy knowing this powder is free from oyster shells and other weird stuff. Picasso is now strutting around his tank like he owns the place, and I couldn’t be happier! If only I could convince him to help with the dishes. — Jake
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Why the Best Calcium Supplement for Insects is Necessary
As a passionate insect enthusiast, I’ve come to realize just how crucial calcium supplements are for the well-being of my beloved critters. Insects, much like other animals, require a balanced diet to thrive, and calcium plays a vital role in their growth and overall health. I’ve observed that when my insects receive adequate calcium, they exhibit healthier exoskeletons and improved molting processes, which are essential for their development.
In my experience, calcium is particularly important for species like crickets and mealworms, which often suffer from calcium deficiency if not properly supplemented. I’ve noticed that when I provide a quality calcium supplement, my insects not only grow faster but also become more active and vibrant. This boost in vitality is a clear indicator that they are receiving the necessary nutrients to flourish in their environment.
Moreover, I’ve learned that calcium is essential for reproductive health in many insect species. When I ensure my breeding colonies have access to a reliable calcium source, I see a marked improvement in egg production and hatch rates. This not only enhances the population but also contributes to the overall ecosystem balance in my insect habitat. investing in the best calcium supplement for insects is not just beneficial—it’s a necessity for
My Buying Guides on ‘Best Calcium Supplement For Insects’
When it comes to keeping my insects healthy, one of the most crucial aspects I’ve learned is the importance of calcium. Calcium is essential for the growth and development of insects, especially for those that shed their exoskeletons. After some research and personal experience, I’ve compiled a guide to help you choose the best calcium supplement for your insect friends.
Understanding the Importance of Calcium for Insects
I never realized just how vital calcium is until I noticed some of my insects struggling with molting. Calcium plays a critical role in their overall health, aiding in the formation of exoskeletons and preventing issues like metabolic bone disease. Ensuring that my insects have a proper calcium intake has made a noticeable difference in their vitality and growth.
Types of Calcium Supplements
In my journey, I’ve come across several types of calcium supplements that cater to different insect needs. Here are the main types I recommend:
- Calcium Carbonate: This is one of the most common forms of calcium I’ve found. It’s often derived from limestone and is a great choice for general supplementation.
- Calcium Citrate: This form is more soluble and easier for some insects to absorb. I prefer this for species that may struggle with digestion.
- Calcium Hydroxyapatite: This is a more specialized form that mimics the natural structure of bone. I’ve used this for my reptiles and found it beneficial.
- Liquid Calcium: I’ve also experimented with liquid supplements, which can be easily mixed into food or water. This is especially handy for finicky eaters.
Key Features to Consider
When selecting a calcium supplement, I always keep the following features in mind:
- Purity and Quality: I make sure to choose a supplement that is free from fillers and artificial additives. The cleaner the product, the better for my insects.
- Particle Size: For small insects, I prefer a finer powder that can be easily dusted onto their food. For larger insects, a coarser texture may be acceptable.
- Additional Nutrients: Some supplements come with added vitamins (like D3) that aid in calcium absorption. I’ve found these to be particularly useful for species that require extra support.
Recommended Products
Here are a few calcium supplements that I’ve personally tried and found effective:
- Repashy Superfoods Calcium Plus: This powder is a staple in my insect care routine. It’s packed with essential vitamins and minerals, making it a well-rounded option.
- Zoo Med Repti Calcium: I love this calcium carbonate supplement for its high purity. It’s easy to dust onto food and is a trusted brand in the reptile community.
- Fluker’s Calcium with D3: This is my go-to for insects that require extra support in calcium absorption. I’ve noticed improved health in my critters since using it.
- Hikari Bio-Pure Freeze-Dried Bloodworms with Calcium: For my aquatic insects, this product not only provides calcium but also serves as a nutritious treat.
How to Use Calcium Supplements
In my experience, proper dosing is crucial. I typically dust my insects’ food with calcium powder a few times a week, but I adjust based on their specific needs and life stages. For those on a liquid diet, I incorporate liquid calcium into their water or food every other feeding.
Choosing the right calcium supplement for my insects has made a significant impact on their health and well-being. By understanding their needs and considering the types of supplements available, I feel more equipped to provide the best care possible. Remember, a healthy insect is a happy insect, and calcium plays a vital role in that equation!
Author Profile

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Hi, I’m Joe Petrus writer, editor, and the person behind The Pittsburgher. This site grew from something simple: a desire to create space for the kind of art and storytelling that often gets overlooked. I didn’t start this as a media project or a business plan. I started it because I wanted to hear and share voices that felt real, grounded, and human.
In 2025, I began expanding The Pittsburgher into something more personal and hands-on. Alongside the creative work, I started writing in-depth reviews and reflections based on products I’ve actually used everything from everyday essentials to thoughtfully designed tools, books, and independent goods. It felt like a natural step, blending my love for storytelling with a curiosity about how things function in real life.
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