what exactly do you use to remineralize RO water? - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 09-12-2017, 06:34 AM Thread Starter
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what exactly do you use to remineralize RO water?

Hi,
i moved to house with water softener so i thought ill just switch to RO water for my tanks. But im kind of lost on how to remineralize the water. do i want to use some sort of commercial remineralizators or order somethng on evilbuy or pick something up at gardening store..
thanks for your answers
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post #2 of 6 (permalink) Old 09-12-2017, 06:45 AM
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Have you run your water through your RO device and tested it? You may not need to do anything else, possibly over thinking it?


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post #3 of 6 (permalink) Old 09-12-2017, 07:52 AM Thread Starter
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Originally Posted by DigityDog70 View Post
Have you run your water through your RO device and tested it? You may not need to do anything else, possibly over thinking it?
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yes, KH=0, GH=0
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post #4 of 6 (permalink) Old 09-12-2017, 12:30 PM
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CASO4 & MGSO4 for GH. Available from anyone who sells EI ferts.

K2C03 for KH. Available on Amazon.

Take a look at popular dosing calculators like Zorfox/Rotala butterfly for dosing.

With these three can dial in any GH/KH you would like.


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post #5 of 6 (permalink) Old 09-14-2017, 07:42 PM
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if i were you i would dose Camgco3 also known as Dolomite, it will add both calcium and magnesium, it will also raise the GH and Kh. i highly suggest 1-2 Dgh/DKh which is enough for plant growth. But CaMgco3 is kind of hard to dissolve, i normally just dump the amount in the tank directly and it should eventually dissolve.

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post #6 of 6 (permalink) Old 09-14-2017, 08:03 PM
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Most plant fertilizers are don't include Calcium / sulfur / and chlorine. These are vital plant nutrients and are not pressent in RO water. Tap water however has plenty of these. Most People use Gh boosters to remineralize the water they either are made from calcium / magnesium sulfate or Clcium / Magnesium chloride in a a ratio of about 3 parts calcium to 1 part magnesium.

If you use a chloride based remineralizer (they are the most common ones) you need to add sulfur. You can use Potassium sulfate to add sulfur to the water. If you buy a sulfate remineralizer (Seachem Equilibrium is one) you will have the sulfur but are still short Chloride. You can use table salt to supply the chloride.

I personally purchased Calcium sulfate and magnesium chloride from Amazon.com and made my own which resloved all 3 fertilizer deficiencies.

You can used Domolite but it barely dissolves in PH neutral water The best you will get is a GH of about +2 and it will keep you PH at about 7.

Note:
Calcium sulfate (gypsum)
Magnesium Sulfate (Epsom salt)
Magnesium chloride
Calcium chloride (often sold as road salt)
Potassium sulfate

All are available on Amazon.com in quantities ranging from small to large. Another source for fertilizer chemicals is Loudwolf.com. They sell in small quantities (typically 4 oz) at a low cost and the orders have arrived promptly in the mail. LoudWolf also sells Bromophenol Blue which is the indicator used in drop checkers.

Last edited by Darkblade48; 09-15-2017 at 08:22 AM. Reason: Please use the edit function for back to back posts to keep threads cleaner
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