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Old 05-26-2006, 12:34 PM   #1
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Pre-mixing water

How long is it safe to keep pre-mixed tap water (no RO/DI yet - treating with Prime) in a sealed container before using? No aeration, no heat, no light. Just sitting in a 5 gallon bucket with a lid. Not neccessarily a perfectly sealed bucket, but a fairly tight-fitting lid.

I've got some free time on my hands and thought I'd mix some up ahead of time, but don't want it to go bad if I don't use it.
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Old 05-26-2006, 01:56 PM   #2
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From what I understand it has a long shelf life.
Be sure to re-heat and aerate it before use of course.
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Old 05-26-2006, 04:27 PM   #3
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You may run into Ph probelms with no gas exchange. It is best to mix up SW and use it within a few days. If you keep it longer, just make sure you aggitate it well and that the Ph and temp are the same as your mainbefore adding it.
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Old 05-26-2006, 07:22 PM   #4
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I have kept SW for months with no issues. I do have a power head in the tub keeping it moving. I would think water just sitting there may go stagnant.
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Old 05-26-2006, 09:06 PM   #5
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I would have to agree with seaham. It can be kept for quite some time, but WITH aggitation.
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Old 05-26-2006, 09:38 PM   #6
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With agitation - that means uncovered., right? .. I have a large dog (St. Bernard) in the house who sheds like mad, so leaving water uncovered it out of the question. His hair gets everywhere.

Two days covered sound safe? Of course, with some time agitation it with a powerhead before using?
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Old 05-26-2006, 09:41 PM   #7
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I have mine covered with a power head in it... I use a garbage can.. You can cut a small notch in the top for the cord to go through. You need flow in the water..
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Old 05-27-2006, 12:22 AM   #8
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Water flow is the key. Even sealed tight gross stuff will grow in it and foul it up with no agitation. I would guess a couple of weeks would be fine, longer than that, I have not tried.
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