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Old 07-15-2012, 02:16 PM   #1
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This might be a dumb question.

I know waterchanges are good and everything. But if water params are perfect and theres nothing wrong with anything in your tank, would water changes still be nessasary?
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Old 07-15-2012, 02:27 PM   #2
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I think Yes, because not only are you restoring new water, you are also restoring minerals and buffers and such.
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Old 07-15-2012, 02:31 PM   #3
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But in a sw tank with ro/di water there aren't any minerals in the water right?
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Old 07-15-2012, 02:33 PM   #4
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Quote:
Originally Posted by Joe5688
But in a sw tank with ro/di water there aren't any minerals in the water right?
Good point. I am speaking in terms of freshwater. I didn't even notice it was in the sw category.
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Old 07-15-2012, 02:36 PM   #5
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Yeah for fw you are correct
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Old 07-15-2012, 03:03 PM   #6
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There's minerals in the salt that coral/inverts will use so Yes you will need to change the water
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Old 07-15-2012, 03:13 PM   #7
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Sorry i was speaking for sw, just thought that could be an interesting subject
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Old 07-15-2012, 03:28 PM   #8
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+1. There are things in the salt that keep the levels correct, such as calcium.
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Old 07-15-2012, 03:30 PM   #9
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Quote:
Originally Posted by Jacobsal91
I know waterchanges are good and everything. But if water params are perfect and theres nothing wrong with anything in your tank, would water changes still be nessasary?
Not a dumb question. Usually everyone eventually asks why water changes are so important.

Well many thinks occur in a reef tank or any salt tank for that matter. Water changes are a means to keep things stable, mimicking ocean conditions.

Heres a short list of what water changes do:

1) remove waste through siphoning
2) export of any nitrate, nitrite, ammonia
3) export of toxins this includes toxins from coral warfare
4) removes depleted water and replaces it with water enriched with calcium, alk, mag, and all other major, minor, and trace elements
5) removes excess CO2
6) introduces oxygen rich water
7) allows you to tune the water parameters easily

These are just some off the top of my head. Ammonia, nitrite and nitrate are not the only things being produced or used in a salt tank. Also nitrate is constantly being produced a some rate.
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Old 07-15-2012, 07:08 PM   #10
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Quote:
Originally Posted by Grizz
There's minerals in the salt that coral/inverts will use so Yes you will need to change the water
What if i add 5 gallons of fresh water to my tank weekly for evaporation, would regular water changes still be needed
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