can gold fish fish filter be turned of at night
Turning the fish's filter off at night killls the bacteria and then denies them a chance to re-colonise, which makes the point of the filter void in the first place.It exposes the fish to ammonia and nitrite poisoning, and is completely irresponsible!! I very much doubt your friends fish are, in any way, fine. just now. Report Abuse. If you turn your filter off at night, then it stops being a filter and simply oxygenates the water. Filters work primarily through beneficial bacteria. When you set up a tank it is not really a suitable environment for fish because it is just a large bowl of water.