Ahh so cute! Haha, I love axies! Yes, my smallest is 4.5" and my biggest is 5.5", the other two are about 5.25" or so.. I like your tank set up! Very nice! I feed mine earthworms, frozen bloodworms, axolotl pellets (i found some on eBay) and frozen brine shrimp, sometimes.. Brine shrimp is so...