Here are a couple more pics. The enclosure is a 36"x36"x18" ExoTerra. One side is elevated about two inches with 4" of water at the deep end. Rocks are pumice so they are actually floating a little. Plat has a couple little rocks under it to prop it up the larvae can hide under it.
I currently have 1x 4yr old, 1x 3yr old, 4x 2yr olds and 5x 1yr olds. I'll be giving away the 1yr olds since they won't morph this year and I don't have tons of space. The 3yr old is currently morphing. She's the one in all the pics attached to this post. You can see how her snout is getting shorter and narrower + eye ridges are starting to raise up. The rest still have more flat, shovel-shaped heads.
They are all currently eating blackworms. They take their time approaching the blackworms but strike with savage fury. I've tried feeding the larger larvae earthworms. They will strike them and tear them apart but they always spit the earthworms back up, not sure why.