hello, a few months back I purchased a 1.5 inch tiger shovelnose catfish, in the first 2 months he went from 1.5 inch to 5 inch pretty quickly, but the last month he hasnt been eating, and the growth is minimal, any reasons why this is happening? i keep the temp. of the tank at 80 and for now hes in a 150 gallon ( 5ft X 2ft x 2ft) with some medium sized cichlids