Feed alot of beefheart, and Hikari sinking carnivorous pellets. Maybe some fresh, frozen shrimp. It worked with mine. Before I knew it... Wow! They were big!
And yet still under 6 inches yet. Seems like outta nowhere they put on 3 inches!
I've heard about people seeing growth spurts from feeding beef heart
must be all the protein, I can't get over the fact that it only lives off of meat lol