Need the low down on using RO water.. - The Planted Tank Forum
 
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post #1 of 3 (permalink) Old 04-15-2010, 04:55 AM Thread Starter
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Need the low down on using RO water..

So it was recommended to me to use RO water when I did my water changes.. However, don't I need to add some minerals or something? I mean pure RO water has like no kh/ph nothing.. Anybody else use RO water? Do you use all RO water or just partly..

Sorry I know I post a lot of questions but I have so many and so little time..
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post #2 of 3 (permalink) Old 04-15-2010, 05:29 AM
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I have small tanks, and questionable water quality (plus I was realllly tired of scraping limescale off every week), so I use a 50/50 mix of distilled and tap currently. Contemplating getting an RO/DI unit in the future though, because I loathe having plastic 2 1/2 gallon jugs stacked up and taking up space. Problem is...once you start you can't just go back to filling up straight from the tap again, at least not quickly anyway if you've got livestock. Are you planning on breeding something, or keeping something that really isn't compatible your tap? Is your water softened artificially by the municipal water system or apartment complex (i.e. no ability to bypass)? Are there chemicals in your tap water that are harmful? If the answer to no, then you most likely don't need the hassle, and extra expense.


If you go RO/DI get a decent sized storage tank. Otherwise you will be SOL if you need to do a big water change because they run pretty slow. You can remineralize with tap or with powders...really depends on how precisely you want to control what goes into your tank. Keep in mind that different brands/models of RO/DI filters produce different ratios of waste water (expensive models may do 1:1 while others will waste 4 gallons to create just 1 gallon of "pure"), so keep that in mind while making a decision.
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post #3 of 3 (permalink) Old 04-15-2010, 01:25 PM
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I use a RO/DI System for all my water I use in my tanks. You are correct that everything is stripped from the water using these systems. When doing a water change, I use Seachem Equilibrium to add back in what is needed for plants. I have been using this system for 3 years now and I love it. The only downfall is the waste water these systems produce. In my case, to produce 50 gallons of RO/DI water I really use 125 gallons (75gals waste).

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