I stumbled upon this post and instead of creating a new one about MY little guy, I thought I would simply post about it here. I, too, aquired a little tiny RBTA. Id say hes about the size of a pencil earser to about the size of a dime (depending on mood). He was pretty adventurous the first few months travling from one end to the other and back again in my 125. The last few weeks, he seems to have settled on a spot (FINALLY) and now only moved around in an area perhaps 3 inches around. He seems to be doing ok but he is not growing, that is for sure. He is the same size now as he was. I know im not expecting some huge growth in the 4 or 5 months I've had him, but a little you would think right?
I feed him 5 or 6 mysis maybe three times a week now that he has hopefully found his place. Before that, Much the same other than a few days to a week here and there that I could not find him for the life of me when he was roaming around. Question is has yours grown at all? Any updates? Is the Mysis sufficiant enough for the little guy? Ive tried small chunks of clam and squid and such, but he just lets those go from what Ive seen.