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Old 05-13-2004, 03:25 PM   #1
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50% waterchange

One of my clowns died a week ago, and I'm thinking of doing a 50% waterchange. But, if my remaining clown is unstable (if he's got the beginnings of whatever the other clown had, although I don't know what it was and he's showing no symptoms...), would taking half of the water out, with all the noise/unsettling etc., maybe do more harm than good? 2 of my cleaner shrimps have also molted last night.

My tank doesn't need this big a waterchange yet, but I just thought it may do some good.

What do you guys think?
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Old 05-13-2004, 03:48 PM   #2
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It won't hurt. I've done this many times.
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Old 05-13-2004, 04:02 PM   #3
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I'm sorry a little off the topic, but how much water would you have to remove before you had to recycle teh tank again? I'm going to be doing some water changes andI dont want to hurt more that help.

Thanks!

PS. Sorry Mark about being off the topic.
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Old 05-13-2004, 04:29 PM   #4
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The cycled part is mainly the objects that exist in the tank, like substrate, rocks and filtration media. You can do very large water changes and still not "break" the cycle because the correct bacteria already exist on the surfaces of these things.

However a normal water change doesn't usually need to exceed 25% unless you have a pollution situation or another suspected problem that would call for a larger-change like that.
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Old 05-13-2004, 07:05 PM   #5
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OK - with me changing half the water, I'm going to make sure my RO unit is doing it's job properly, and get some test kits to test the waterchange water.

What should I be testing for in the RO water, and what levels should they all be at?
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