Hi all, Pingpong has been at the bottom and in the corner of the tank for a few days, today the other fish have been a bit doppy but all were eating food. Tonight all my fish have eaten very little. Tested water as follows :-
Ammonia 0 Ph test 7.5 Nutrafin nitrate test undecipherable.
Did a 30% weekly water change as usual yesterday & added heater set to 22 degrees this evening.