All my fish have become sick suddenly.... I noticed yesterday that there was a lot of slime floating in the water, the fish have fins clamped, fins are going white and erroding, they have bloodshot faces and sit all facing the same way very still and pale, some breathing from only one gill. One fish has shed its stomach lining. All appetites are very good but after food they go very still. pH7.3 30 Degrees Celcius 0 Nitrite 0 Ammonia 30 ppm Nitrate kH & gH approx 3 degrees What I've done. Flubenol 15 - 2 grams per 160 litres incase of flukes 80% water change with Preheated HMA (from new cartridges) 1st treatment with No.9 I think its internal bacterial due to the blood under the flesh around the nasal area. I'm going to keep the water changes up for a few days and observe now. Ps. A couple are flicking heavily off tank furniture. Any more ideas?