well i have a bat fish a an ell, qeen angel and 3 groupers idk how to spell the name its a 250gl tank the set up have about 4 years well salinity is 1.028 temp 78 i dont know about the rest because its my dads tank and he is the hospital and im taking care of it and the lionfish died yesterday same thing as the otherone but the otherone last longer in that condition