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Old 01-21-2011, 11:31 AM   #1
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Saltwater change premixed vs mixing myself

Ok today I need to do a 15 gallon water change to try and lower nitrates.... I have always used premixed water from LFS but it is getting pretty expensive .... If I mix the water myself today do I have to wait to change the water or can I put it in after I mix it.... I have extra powerheads to help mix it and they are pretty powerful....or should I eat my loss and buy premixed for the time being.....
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Old 01-21-2011, 11:34 AM   #2
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most leave it over night to make sure it completely mixes and add a heater to keep the temp matched to your tank
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Old 01-21-2011, 11:37 AM   #3
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Well I can make it same temp no prob .... I am only mixing 15 gal and using 1300 gph powerhead to mix.... Do you think I would be able to put it in w/o harming fish after hour or so?
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Old 01-21-2011, 12:02 PM   #4
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You're doing a 15g water change, but how large is the tank? Are you changing 10% of the water or 1%?

Allowing it to sit for 24 hours is ideal. This allows not only for the salt to mix, but for the agitation to stabilize the pH of the new water as well.

You can do an "emergency" water change without letting everything stabilize, but it's not preferred.
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Old 01-21-2011, 12:30 PM   #5
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It is a 60 gallon tank and I think it would have to be emergency change being that my nitrates are 60-80ppm
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Old 01-21-2011, 01:58 PM   #6
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In that case, I think you'll be okay, I just wouldn't make it the standard. Give it as much time as you can to mix up and make sure the salinity is correct. Run the powerhead pointing at the surface to get as much surface agitation as possible in the process too.
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Old 01-21-2011, 02:57 PM   #7
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Keep in mind that salt is actually bad for the fish if not mixed long enough. But in this emergency situation, you should be okay if you give it a couple of hours.
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Old 01-21-2011, 06:40 PM   #8
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Well I mixed the salt with 2 1300gph powerheads for 2-1/2 hours checked salinity and it was at 1.022 so was my tank.... I poured in the water fish seem fine but now it's saying 1.026-1.028 .... Is that possible and will it harm fish?....
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Old 01-21-2011, 07:40 PM   #9
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was the water level in the tank low when you added it?
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Old 01-21-2011, 10:33 PM   #10
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Both levels were identical ... 1.022
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