by Walter Soestbergen » Sat Jan 31, 2004 12:50 pm
I recommend at least 10%-15% per day than lower figures - yes 50% a week will certainly work - but I get better results with more frequent water changes. I change 50% everyday in every tank except those tanks with small fry under three weeks of age. Just make sure the replacement water is as close a match to the water being removed as possible.
I'm myself, there are already enough others.