I hear ya Davekyn. Growing out fry of most takes more dedication then getting them to spawn. I've been spawning dwarf bristlenos plecos for a few years now. Here are some tips.
Bear in mind that rate of growth is very slow. It takes 9 months for them to be fully grown and the rate of dwarfism is fairly high.
1. A pH over 7 must be maintained. The fry will often stop eating and starve to death in acidic water.
2. They are omnivores and require food high in protein to grow. So you should include any high quality flake food along with fresh veggies and algae wafers when you feed.
I grow them out in a barebottom 55 gallon. The tank contains some driftwood and java fern. These guys are little poop machines and a bare bottom tank makes it easy to siphon. Keeping your tank and filters as clean as you can improves rate of growth and health of the fish. I use 3 sponge filters and a Penguin 300 HOB
with a sponge pre filter.
This species always seems to be in demand but rarely does one see adults in an lfs
. I think it's because although they readily spawm, they are tough to grow out. Therefore, they should command a high price at over 2 inches.