Quote Originally Posted by fhydro
OK for the way to fix the prob, but where does it come from? Can it be due to cold water ?
Thanks Zandor
No not cold water, cold water is better for them. Cold water can hold more oxygen then warmer water.

It's just bacteria most of the time, something brought it in is all. That's why I tell people to mesure the run-off water for signs of problems before they show up in plants. The smell test is the next good one but by then you already have a problem.

Good luck with that.