md_mohammad

hello guys,

need to know, how often should we do a complete water change

ABCDemily

Complete? As in removing all the water? That'd be a no-no probably. It'll stress the fish and will probably through you head first into a mini-cycle.

I do a partial change of 20% every week, and 40 % at the end of the month.

harpua2002

There shouldn't be any reason to do a complete water change. I change 50% weekly on all my tanks and water tests out great.

wooza

I wouldn't say it is necessary to do a complete water change at all. With regular gravel vacuuming and weekly partial water changes, your water should stay rather healthy.

Man you guys reply fast!!

ABCDemily

I think I have new thread syndrome. If I see one un answered I just have to! My fingers probably start shaking as well!

md_mohammad

oh great..thank a lot guys...i do partial water change...but my gravels n stones hv gone black...probably vaccumin will help...thank u once again

aquarist48

Hello. The gravel that you said has gone "black" is probably diatoms/algae. It will go away on it's own in time. Yes, a gravel vacuum will help as well. I do water changes every 10 days and vacuum 1/3 of my tank every month. You never want to clean everything at one time or you'll lose the cycle. As mentioned above you should never have to do a complete water change. By the end of the month I've changed 1/3 of my tank water (at least). Make sure all the water has been de-chlorinated.