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Old 02-20-2011, 05:22 PM   #1
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RO/DI reef only?

There's an RO/DI for sale. It's a 100gpd 5stage for less than $100. It says for reef. Can I use it for freshwater? Thanks.
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Old 02-20-2011, 05:52 PM   #2
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RO/DI takes out all the minerals an makes the water softer. I read that I need to add minerals if I want to use it for freshwater? Is that right? Isn't that going to make the water hard again? Need help here. I need to learn more about RO/DI before I buy them. Anyone?
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Old 02-20-2011, 07:16 PM   #3
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The 5 micron coconut carbon block filter removes chlorine, chloramine and other stuff. Does it mean that I won't have to use PRIME? Or is it advisable to still use it?
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Old 02-21-2011, 02:08 AM   #4
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You will not have have to use prime anymore. Water will be perfect. If used for freshwater, you will have to add back minerals. But for saltwater, the salt will add back nutrients.
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Old 02-21-2011, 02:10 AM   #5
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What I mean by add back minerals, you will have to add back the minerals striped out. But the water will be just h2o.
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Old 02-21-2011, 02:13 AM   #6
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Quote:
Originally Posted by Bige
What I mean by add back minerals, you will have to add back the minerals striped out. But the water will be just h2o.
How do you add the minerals back? I dose for my plants. Are those enough? Or is there a specific "mineral" when using RO/DI? Thanks.
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Old 02-21-2011, 02:18 AM   #7
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No, that is not enough. I think it is called ro right. It replaces what is removed. But if you have specific fish there is specific minerals for the fish. What do you have and I will see if I can find it.
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Old 02-21-2011, 02:21 AM   #8
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Quote:
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No, that is not enough. I think it is called ro right. It replaces what is removed. But if you have specific fish there is specific minerals for the fish. What do you have and I will see if I can find it.
I am actually buying a RO/DI so I can keep discus and cardinal tetras.
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Old 02-21-2011, 02:35 AM   #9
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I believe there is a discus additive. If you dont use it, you will have ph problems.
Aquarium Water Conditioners for RO Water: Kent R/O Right Water Conditioner

Freshwater Aquarium Water Conditioners for RO Water: Seachem Equilibrium RO Water Conditioner

If you are going for discus, I would post a thread for discus Ro additives. There is a guy here that specializes in them and maybe he can be more helpful. I think both of these I listed would be great but there may be something better. Good luck. I kept discus for years and they are my favorite fw fish. Becareful buying wild caught. They can be very hard to keep. They have specific Gh and can lead to problems. Check out Jack whatley. When I used to buy he had captive bread. And high quality. This may be out dated.
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Old 02-21-2011, 02:43 AM   #10
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Are these RO right also called buffer? I saw a seachem discus buffer powder earlier today at my LFS. Thank you for the big help. I will now order the RO/DI system. You're the only one that replied to to this thread. Thanks again.
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