Join Date: Mar 2012
Location: Bellefontaine, Ohio
If you have high nitites and ammonia, don't do a large water change all at once - you may damage or kill your fish. I recommend doing only 20%, or less, daily changes for at least 10 days, or even more, so the fish can acclimate to the new water without too much stress. Some fish can adapt to bad water and putting them in new, clean, water can kill them.