Crushed coral for RO water? - The Planted Tank Forum
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post #1 of 10 (permalink) Old 06-15-2017, 08:53 PM Thread Starter
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Crushed coral for RO water?

Hey gang,

Would crushed coral in bags, in my filters be the best way to buffer or increase KH?

Thanks!

Clint

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post #2 of 10 (permalink) Old 06-15-2017, 09:25 PM
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crushed coral will buffer the pH and kH by releasing calcium carbonate as it slowly dissolves in the water....putting it the filter will make it work faster. Using crushed coral is certainly a long-term solution as opposed to using baking soda, but will also lose effectiveness as it is used up. Crushed coral in your water which has a kH of 0 would probably only be effective for around 1 - 2 years, when it would need to be added to or replaced.
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post #3 of 10 (permalink) Old 06-15-2017, 10:23 PM Thread Starter
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Quote:
Originally Posted by feraledgeoutdoor View Post
crushed coral will buffer the pH and kH by releasing calcium carbonate as it slowly dissolves in the water....putting it the filter will make it work faster. Using crushed coral is certainly a long-term solution as opposed to using baking soda, but will also lose effectiveness as it is used up. Crushed coral in your water which has a kH of 0 would probably only be effective for around 1 - 2 years, when it would need to be added to or replaced.
What are the pros and cons vs CC and baking soda? What if I just put the bag of CC in the container that I hold the RO water in? I add GH booster to it a day before I add it to the tank so it's fully dissolved.

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post #4 of 10 (permalink) Old 06-15-2017, 10:28 PM
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what is RO water?
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post #5 of 10 (permalink) Old 06-15-2017, 10:40 PM Thread Starter
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what is RO water?
Reverse Osmosis. It's run through a filter that removes all TDS. You then remineralize the water to the parameters you would like.

Clint

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post #6 of 10 (permalink) Old 06-16-2017, 12:07 AM
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I think there might be two things to consider. First, baking soda is more accurately measured. Second, speed of action. Just guesses....


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post #7 of 10 (permalink) Old 06-16-2017, 12:51 AM
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Quote:
Originally Posted by Dempsey View Post
What are the pros and cons vs CC and baking soda? What if I just put the bag of CC in the container that I hold the RO water in? I add GH booster to it a day before I add it to the tank so it's fully dissolved.
CC will last longer in your tank or RO in water storage. baking soda is just a fix for short term and will need to be re replenished in just days. now you will not get the full effect of the cc by putting it in the Ro water storage as cc works better when it as water flowing threw it... say if you have a KH of 0 you can add 1 pound or three pounds of cc to your tank ( filter, storage , or substrate ) and its only going to raise is by 1-3... with backing soda you can raise it to what ever you want but dont shock your tank.
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post #8 of 10 (permalink) Old 06-16-2017, 10:16 PM Thread Starter
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Thanks for he replies! So would seachem neutral regulator work until my order of CC is delivered?

Clint

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post #9 of 10 (permalink) Old 06-17-2017, 06:46 AM
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Thanks for he replies! So would seachem neutral regulator work until my order of CC is delivered?
It's basically overpriced baking soda - sodium bicarbonate. Someone can correct me on this, but I believe crushed coral only dissolves in acidic water, so it doesn't do anything once your pH hits 7.

The thing I like about sodium bicarbonate is that you can measure it more easily, match parameters for water changes (more stability), and it's dirt cheap.
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post #10 of 10 (permalink) Old 07-11-2017, 09:34 PM
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Originally Posted by natemcnutty View Post
It's basically overpriced baking soda - sodium bicarbonate. Someone can correct me on this, but I believe crushed coral only dissolves in acidic water, so it doesn't do anything once your pH hits 7.

The thing I like about sodium bicarbonate is that you can measure it more easily, match parameters for water changes (more stability), and it's dirt cheap.
Calcium carbonate will still dissolve in pH above 7, at slower rates. It depends on the saturation points of the Calcium and Carbonate ions. As Caco3 dissolves it reacts with H+ which is what makes the water acidic. pH is a measure of the concentration of H+, in case you dont know. pH=-log [H+].
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