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Old 11-10-2016, 06:59 PM   #1
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Water changes: how much is too much?

Hi all, so I just did a water change on my 20G FW tank. I was thinking about doing two changes a week to assist water quality. Do a 5 gallon change, every Tuesday and Friday, but I'm also worried that may be too frequent of water changes. Can anyone offer insight?
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Old 11-10-2016, 08:30 PM   #2
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That is neither too often nor too much.
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Old 11-10-2016, 08:35 PM   #3
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That is good info to know! Thank you!
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Old 11-10-2016, 11:04 PM   #4
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Be careful! Doing too big of a water change at once can remove aerobic bacteria and cause the tank to cycle again. I usually never do more than 20%
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Old 11-10-2016, 11:12 PM   #5
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I think most of our old timer fish geeks would say you're fine. I have done 30-50% changes weekly for the past several month with no issues. I need to STOP over feeding...
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Old 11-10-2016, 11:23 PM   #6
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Quote:
Originally Posted by rockeyemma19 View Post
Be careful! Doing too big of a water change at once can remove aerobic bacteria and cause the tank to cycle again. I usually never do more than 20%

The beneficial bacteria colonize most surfaces in the tank, especially where there is good flow such as in the filter. Water changes will not affect their population.
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