Ok in one of my tanks i had Harlequin Rasboras. 5 of them died in the first week .. So we went and got the water tested and the ph and ammonia is good but the nitrite and nitrate is off the scale IN THE WRONG DIRECTION. It got messed up because we were told to completely start again with it and clean the glass and the gravel and everything. So we did that but we used soapy water on the glass and all the soap chemicals got stuck in the glass and keep producing bad stuff for the tank. But this one fish ( i call him Super Fish ) is still alive with all the bad nitrite and nitrate. So can someone please tell me how he is still alive ??