I currently have 8 ornatum 5 i just purchased maybe two months ago that are 3''s and 3 that are large 8" male, 7" male and a 6" female. The 3 large ones are in a 300gal with 4 cobra pikes that are around 6-7"s a piece. The 5 3''ers are in a 125 gal. two years ago I had eight that died from bloat because of the temp. From my experience they seem to like cooler water when at small sizes, I keep my small ones at 72 degrees and they eat good and are very active, once they get too the 4" range then maybe you can bump up the temp but even my Large ornatum are in 78 degrees. To me when they get to that 8" mark its hard to match their ridiculous colors that they display so IMO its worth keeping them. They grow IMO just as slow as festae. I would say get them and try it out