I have a treid ebjd a couple times with limited success. I have kept two groups one in my 50g L14,L200, L184, panda uaru grow out tank and some in a 10g very small L14 grow out tanks. Both tanks no ammonia, nitrite, low nitrate. Twice a week 40% WC. The same thing keeps on happening to me. They grow great then anywhere from 1.5 inches to 5 inches. They stop eating for a day and then start panting and then normally two days latter they die. They are all in very good body condition. Any thoughts? Anyone have similiar experiences?