ErinF90
Aquarium Advice Regular
Help! Woke up this morning to find half my fish dead, the other half at the top. I did a 30% water change yesterday and also put in a new (not new filter but new to the tank, came from one of my existing tanks, were no problems in it just only have time for one tank). It's a 90 gallon and the filter is a marineland c-360 and also have an API nexx with 2 canisters. My nitrates are 10, ammonia 0, nitrites 0. Could it be too much filtration??