I got a 12" texas and 10" butterkoferi from a seller one month ago. I saw him feed them dog food when I went there to pick up. after I got them, i never see them eat anything but they look healthy. I also bought dog food for them but they do not eat. I tried hikari cichilid gold pellet, cichild staple. I put things in but never see them eat. those pellet i put in disappear after i came back from work. but I am afraid it was eaten by other fish or dissolved and filtered out. what is the possible reason and what is the solution?