stumpy
Aquarium Advice Activist
I am using a Penguin Bio-wheel 330 on my 30 gal tank. When I do my 10% water change every week I take out the filters and spray off all the brown gunk with the kitchen sink sprayer. Is this the correct way to do it? When the filters go back into the Bio-wheel they are saturated with tap water. I have never tested my tap water. Will this hurt any thing? Also, how often should I throw them away and put in new ones?