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Old 10-22-2006, 08:32 PM   #1
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How much water for a PWC

How much water should i take out in a PWC in a 50gal
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Old 10-22-2006, 08:58 PM   #2
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We do 1 gallon on our 10 gallon this usually replaces the used trace elements and freshens the water
10%-20%usually is what most do or in your case 5 gallons -10 gallons per week generally speaking . HTH
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Old 10-22-2006, 11:35 PM   #3
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I do about 20-25% every 2-3 weeks.
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Old 10-22-2006, 11:51 PM   #4
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I do 10-20% every week.
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Old 10-23-2006, 10:13 AM   #5
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I divided my tank into 4 quarters, from top to bottom and marked off the 1st quarter, that's how much I take out and add. Mine is roughly 20-25%, since I am not so great at math.
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Old 10-23-2006, 10:27 AM   #6
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Quote:
Originally Posted by roka64
I divided my tank into 4 quarters, from top to bottom and marked off the 1st quarter, that's how much I take out and add. Mine is roughly 20-25%, since I am not so great at math.
That looks like good math to me.
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Old 10-23-2006, 10:29 AM   #7
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Quote:
Originally Posted by melosu58
That looks like good math to me.
LOL!! I find if I can't figure it out with logic, I default to common sense and AA!
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Old 10-23-2006, 01:20 PM   #8
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10-20% weekly or at least every two weeks is prettly much the standard. This is what I do with my 90g, 15g every 1-2 weeks depending on my schedule.

Much more than 20% in a smaller system (under 75g) and I think you risk distrubing the balance.

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Old 10-23-2006, 02:58 PM   #9
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For my 75 I also change 20% (15 gal.) every other week.
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Old 10-23-2006, 03:21 PM   #10
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On my 135 gallon FW tank I do about a 50% water change every friday, just for the fact my oscars are really messy and I like the nitrates to stay well below 20ppm I like it around 4-6 and on my 6.6 gallon I do about three 2 gallon water changes a week because I am slightly overstocked because I have a gold severum in there that is about an inch long and I am growing her out to put in my 135 with my oscars when she is bigger.
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