My tank is in utter turmoil ... I just lost 3 clown loaches, 1 platy, 2 hillstreams loaches, 1 killie, 3 rams and a few otos.
I tested with my normal 5-in-1 test strips and everything looks the same as always (low nitrates, 0 nitrites and 0 ammonia, ph 7.6) ... fish store confirmed the same...