I got four of these guys a week and four days ago. I kept one and the others went to friends and family. Two have died. I havent seen mine eat since receiving them. Ive tried sinking cichlid pellets, floating reptomin, plankton, and live blackworms with no success. Tank is bare bottom one peice of driftwood couple fake plants. There is a turtle dock in there as well as floating plant. Temp is 81-82 ammonia 0 nitrite 0. Does anyone have any ideas what to do or try. Turtles have doubled in size from the seller and were all healthy and eating for 6 months. The 2 that died did the same thing the day before they were found dead. Legs and neck streched out mouth open and then did a few type of seizure looking moves. Any advise or help would be appreciated!