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Old 06-02-2010, 02:20 AM   #1
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Water change frequency

I change my water 25% once a week. I went to a lfs and their jaw dropped when I said that. They said that is too much. What's your opinion?
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Old 06-02-2010, 02:24 AM   #2
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Depends on the size of the tank right? 25% of 100 gallons is nothing compared to 25% of 20 gallons.

Personally.. i don't think it's that bad.. It's only 7.25 gallons out of 29 so it's really not that much. I'll probably be doing five gallon changes on my 25G tank.
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Old 06-02-2010, 02:34 AM   #3
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There is noting wrong with 25% once per week. I would do that much if it was easier, but my tank is pretty big. I do roughly 16% per week.
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Old 06-02-2010, 02:34 AM   #4
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Once your tank is about 8-12 months old you can start easing off. The parameters are more constant and the LR is mature. I only do 20% biweekly after almost a year and a half.
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Old 06-02-2010, 03:24 AM   #5
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Bige, never to much water changes. your LFS is looking at the bottom line as far as cost and that is their reason.
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Old 06-02-2010, 08:21 AM   #6
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If they say something about losing to much beneficial bacteria cause the PWCs are taking them out don't listen. It's all on the rocks.
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Old 06-02-2010, 09:15 AM   #7
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I've been doing about 20% every week for over 20 yrs and have no plans on changing that schedule.
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Old 06-02-2010, 09:30 AM   #8
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I just completed a 25 gallon PWC for 5 straight days in my 125. Yes, a 100% water change in a week. I was fighting some bad maintenance on my part where my params got out of whack. Normally I do a 25g PWC every other week and will return to that schedule now.

25% a week is a great way to maintain pristine water conditions (depending on feeding).
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Old 06-02-2010, 01:47 PM   #9
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I have a 125 gallon tank and change mine every week. Tell your LFS to put his jaw back up. LOL
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Old 06-02-2010, 01:59 PM   #10
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Ans sell you more salt mix!
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