Common Black Soldier Fly Larvae Feeding Mistakes
Black soldier fly larvae are about as low-maintenance as feeders get, but there are a handful of avoidable mistakes you can make — most of them are easy to fix once you know what to look for.
This guide runs through the most common BSFL mistakes so you can avoid them. For the full setup basics, see our black soldier fly larvae care guide.
Quick takeaway: Most BSFL issues come down to storing them too cold, feeding them once they've pupated, choosing the wrong size, or dusting them out of habit when it isn't needed.
Storing Them Too Cold
Unlike mealworms, BSFL don't do well in the fridge. Keep them somewhere cool but mild, aim for 15°C. They can do completely fine at room temp, but will pupate faster. Keeping them cooler prolongs their shelf life. For the full breakdown, see how to store black soldier fly larvae.
Feeding Them Once Fully Hardened
As BSFL approach pupation they darken and firm up. They're still fine to feed early in this process, but once they've fully hardened into pupae, they're no longer as good of a feeder. This is due to no movement and high amounts of chitin.
Choosing The Wrong Size BSFL
BSFL are more forgiving than tougher feeders, but sizing still matters — as a rule of thumb, choose larvae no larger than the gap between your reptile's eyes, especially for younger or smaller animals.
Equally so, larger reptiles may be less interested in the smaller BSFL. So always try to match the larvae size to your reptile, if your supplier offers multiple sizes.
Dusting Out of Habit When It Isn't Needed
It's easy to dust every feeder as a matter of routine, but BSFL already carry a great calcium-to-phosphorus ratio on their own. Regular dusting isn't necessary — save the effort for other feeders that need it.
Storing BSFL Too Wet
When you store BSFL in a container, it's common for keepers to offer them some fresh fruit or vegetables to keep them fed. But this can often cause the tub to become wet and smelly.
Monitor your storage tub closely and only feed small amounts of food at a time. BSFL can also climb smooth plastic if they're wet, so this can be an escape risk.
Relying on Them as the Only Feeder
BSFL are a very strong staple, but no single insect covers everything a reptile needs. Rotate them alongside other feeders like crickets and woodies, with mealworms or superworms as an occasional treat.
Getting Started
We at Reptifauna supply black soldier fly larvae across Australia (excl. WA & TAS). You can find more information below:
Browse the wider range in our black soldier fly larvae collection.
Final Thoughts
Almost every BSFL mistake comes back to storage temperature, feeding, or sizing. Once you get a few basics right they're one of the easiest feeders you can keep on hand.
For full day-to-day care, see our black soldier fly larvae care guide, or browse the complete guide to feeder insects in Australia.