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Old 08-19-2013, 03:05 PM   #1
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Good WaterChange Schedule w/o Any Equipment

What do you think would be a good waterchange schedule without any dosers, skimmers or other equipment on a reef tank. Just simply relying on waterchanges.

weekly % ?
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Old 08-19-2013, 03:15 PM   #2
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how big is the tank?
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Old 08-19-2013, 03:32 PM   #3
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lets say its a 6' 200gal tank. anyway, i know it depends on what you keep. but i want a general answer. lets say its a mixed reef with about 20fish. mostly anthias and chromeses.
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Old 08-19-2013, 03:58 PM   #4
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20% per week. Based on testing.
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Old 08-19-2013, 04:11 PM   #5
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20% a week would definitely do the job but might be overkill unless you have a big bio load or a lot of sps. I think 10% per week is a good rule of thumb but as stated it depends on the setup.
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Old 08-19-2013, 04:12 PM   #6
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Quote:
Originally Posted by Bige View Post
20% per week. Based on testing.
That's like 80% per month! Are you sure? if one follows your advise they will need $900 a yr just for the saltmix
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Old 08-19-2013, 04:32 PM   #7
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And that is why with a big tank you need more filtration than just water changes...
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Old 08-19-2013, 04:36 PM   #8
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I agree with erichm20.
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Old 08-19-2013, 04:39 PM   #9
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Either would work on a normal biolad. If you had a heavy bioload then the twenty would be needed.
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Old 08-19-2013, 05:40 PM   #10
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I have a 6 foot tank and the amount of skimmate I get in a week is pretty astounding. If you wanted to bypass the skimmer as you said above then yeah, I would go with 20% weekly to be sure. The skimmer can help immensely with water changes as it gets out alot of organic stuff. I keep a lightly stocked mixed reef in my 125g and do about 60% water change every few weeks. This keeps the parameters in check but not perfect. ANd again, I only have a half dozen fish right now. It also depends on the corals you keep, I have very easy ones so they are not gobbling up the elements as quick as SPS or a montipora cap might. In my opinion it really depends on what you are keeping.

As for the expense, I go through say 200g of water a month at least, and thats just with water changes and not top offs. I have my own ro/di and mix my own I/O salt so that helps alot.
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