WTF is going on here??? ph 7.6, ammonia <.25ppm, nitrite 0ppm, nitrate 80ppm. Tank was totally fine until three days ago when I noticed 2 of my bichirs has bloody red bellies. I have treated with melafix and aquarium salt. The bichirs bellies are back to normal but my rays are acting funny and my big female has a red bottom and excessive goosebumps. Her belly is not as red as in pics but you get the idea.