i feed all three 1/3 of a market shrimp a day each...the same size shrimp my 15" aro eats 2.5 everyday...sometimes i give a goldfish or two...i didn't think that was to much...my water is at 84f so there matabilisum is fast as hell...they are hungery after 4hr but i dont feed them again...the gold one has a faster growth rate then the other two...and the head is wider so i was thinking it was a diff subspieces but i'll see when the adult patterns come in...now they are in my big tank so hopefully they will grow faster with the new extra large space...these are not my first cats...i have had a rtc and a rtcxtsn before i feed the same diet with no problems...they died after a tank crashed...now i have these tsns and my 5-6" syno cat