Phoenix worms are quite small. I'd buy 1/2 inch or 3/4 inch for your leo. Be sure to rinse them in a fine mesh colander. Only your leo knows for sure how many he will eat. I'd not dust them, at least initially.
I'm not sure whether you scrolled through the link to see the BSFL details direct from the Phoenix Worm Company. They know their stuff. Here they are:
Black Soldier Fly Larvae (Hermetia illucens) Care
Phoenix/calci/repti worms & NutriGrubs
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(quoted from the Phoenix Worm website)
Black soldier fly larvae (BSFL --
Hermetia illucens) are also known as Phoenix worms, reptiworms, calciworms, and NutriGrubs. They are naturally calcium-rich.
Phoenix worms, calciworms, reptiworms, and NutriGrubs have been fed differently.
Genuine Phoenix worms retain all their nutritional values and must NOT be fed. Feeding PWs would restart their digestive system; they would defecate in the cup; and soon you would have bacteria growing and dead stinky worms. Simply keep the worms in the closed cup, store in a cool location (~55*F, ~12.8*C), and feed off as needed. Keep them in a picnic cooler with a solid ice pack changed out every 12 hours.
For many geckos order the largest size: 3/4 inch (2 cm).
- Rinse the medium off. A fine mesh sieve works great.
- Let them crawl around on a paper towel to dry, then feed. If they are dry, they will not climb.
- Even some of the black ones "rejuvenate" when rinsed if they are not too far gone.
- The darker ones are higher in calcium.
- Save the dead ones. They may morph into flies, which your gecko may eat.
Click:
The Phoenix Worm Store Home Page
Click:
Frequently Asked Questions – Phoenix Worm Store
Phoenix worm feedback:
The Phoenix worms I received 4 Nov 2015 from the online Phoenix Worm store seem to last forever! I ordered 100 Ls and 150 XSs. I fed off the Ls quite soon to several geckos, but the XS were much too small for the geckos who approved. I still have a handful of the XSs 3.5 months later! All I've done is keep them in a cool room (62-67*F, 16.7-19.4*C) and add a little water occasionally.
- HOWEVER: The Phoenix Worm company suggests only ordering a 3 week supply.
- Q: Should I refrigerate Phoenix Worms?
A: NO. Phoenix Worms can tolerate high temperatures and will survive short exposure to freezing temperatures, but will have the best shelf life when stored at 50-60*F (10-15.6*C). A wine cooler or basement are great storage places, but setting the cups near an A/C vent will work just fine in the summer. Although it's possible to keep these worms alive for months when stored at 50*F (10*C), you should only order the number of worms that will be fed off within 3 weeks so your animal will have fresh food.