Top Off Water. - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 03-02-2009, 04:50 AM Thread Starter
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Top Off Water.

So in my tank i am using a mix of RO water and my tap (which is VERY hard well water). My mix gives me a pH of about 7.2 and a hardness of 6 dKH. Now when water evaporates for myt top off do i use the mix or the fresh RO. I guess what im asking here is do the minerals making in the hard water, hard water stay in the tank when water evaporates?
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post #2 of 6 (permalink) Old 03-02-2009, 04:59 AM
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Yes, the minerals stay in the tank when the water evaporates. If you're doing regular large water changes (e.g. EI with 50% weekly changes) then it's not really worth worrying about. If you, on the other hand, are doing infrequent water changes the minerals will build up and it would be wise to top-off with a mineral-free water source. Since you're using RO, just use unreconstituted for top-off purposes.

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post #3 of 6 (permalink) Old 03-02-2009, 05:08 AM
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I'm just curious. Why no use RO water for top offs as well as waterchanges?

I don't do top offs because I do weekly 50% water changes, but I use strictly RO water (mainly because I don't like messing with chemicals).

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post #4 of 6 (permalink) Old 03-02-2009, 05:20 AM
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Originally Posted by BiscuitSlayer View Post
I'm just curious. Why no use RO water for top offs as well as waterchanges?

I don't do top offs because I do weekly 50% water changes, but I use strictly RO water (mainly because I don't like messing with chemicals).
Pure RO makes my water wayyy to soft to keep certain species of shrimp.
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post #5 of 6 (permalink) Old 03-02-2009, 06:30 AM Thread Starter
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well im going to do 40% changes weekly is because my mix of water is 3 gallons RO to 1 gallon tap = 4 gallons. Just easier to mix up and producing a more accurate mix everytime. imeridian what do you mean in your post by EI with waterchanges?
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post #6 of 6 (permalink) Old 03-02-2009, 06:43 AM
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EI, or Estimative Index, is a fertilizing program that suggests 50% water changes weekly.

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