Remineralizing RO/DI - The Planted Tank Forum
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post #1 of 29 (permalink) Old 08-27-2019, 03:00 PM Thread Starter
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Remineralizing RO/DI

With the chlorine, chloramine and high tds in our water I just want to start with a clean slate rather than trying to treat tap water.
Before adding ferts, what is the best way to remineralize to get me back to a good baseline?
I'll be making batches of 50 gallons at a time so would like to mix right in my storage tanks.

TIA!

-Dennis
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post #2 of 29 (permalink) Old 08-27-2019, 03:16 PM
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Quote:
Originally Posted by d2creative View Post
With the chlorine, chloramine and high tds in our water I just want to start with a clean slate rather than trying to treat tap water.
Before adding ferts, what is the best way to remineralize to get me back to a good baseline?
I'll be making batches of 50 gallons at a time so would like to mix right in my storage tanks.

TIA!
A lot of the answers you will receive will be personal preference. There are many remineralizers on the market and many ways to achieve your goals. DIY salt mix like @somewhatshocked has posted about in his journals. Equilibrium (sometimes met with opposition), Gh/kh boosters, salty shrimp etc. Really I suppose this depends on what your ultimate aim for parameters are in the end. Bicarb soda and dry salt mix may be the cheapest and most controlled method available.
Definitely read some of the more experienced planted tankers journals with custom ro/di setups.
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post #3 of 29 (permalink) Old 08-27-2019, 03:39 PM
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CaSO4 For Ca / gH - 20-30ppm
MgSO4 for Mg / gH - 5-10ppm
KHCO3 or K2CO3 for kH - 0.5-1.0 degrees.

https://rotalabutterfly.com/nutrient-calculator.php - punch in your 50 gallons, and set range for each compound and it will tell you how much is needed.
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post #4 of 29 (permalink) Old 08-27-2019, 03:58 PM Thread Starter
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Originally Posted by Quagulator View Post
CaSO4 For Ca / gH - 20-30ppm
MgSO4 for Mg / gH - 5-10ppm
KHCO3 or K2CO3 for kH - 0.5-1.0 degrees.

https://rotalabutterfly.com/nutrient-calculator.php - punch in your 50 gallons, and set range for each compound and it will tell you how much is needed.
Thank you. I think this is probably what I was imagining... some kind of dry mix.
Would be nice if someone offered a big 5g bucket of dry mix, with all needed ingredients, like you see with Saltwater mix. I'd pay a little more for that vs having to source the individual elements.

Bump: Oh and the choice between khco3 and k2co3... what do I need to base my decision on for that?

-Dennis
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post #5 of 29 (permalink) Old 08-27-2019, 04:05 PM
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Originally Posted by d2creative View Post
Thank you. I think this is probably what I was imagining... some kind of dry mix.
Would be nice if someone offered a big 5g bucket of dry mix, with all needed ingredients, like you see with Saltwater mix. I'd pay a little more for that vs having to source the individual elements.

Bump: Oh and the choice between khco3 and k2co3... what do I need to base my decision on for that?
GLA has everything you need. Easy one-stop shop.

Grab a 50 gram scale with calibration weight accurate up to 0.001 grams for $20 off amazon and you're all set.

Whatever is available between KHCO3 and K2CO3 is what you use.
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post #6 of 29 (permalink) Old 10-07-2019, 04:19 PM Thread Starter
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It's time for me to actually purchase this stuff.
Am I just missing it, or does GLA not have the KHCO3 or K2CO3???
https://greenleafaquariums.com/categ...zer/macro.html
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-Dennis
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post #7 of 29 (permalink) Old 10-07-2019, 04:30 PM
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It's time for me to actually purchase this stuff.
Am I just missing it, or does GLA not have the KHCO3 or K2CO3???
K2CO3/KHCO3 readily available lots of places including Amazon.

And second everything Quag said above.

The advantage to having separate compounds is that you can custom tailor to your needs. For instance, I dose to Ca 34 and Mg 17. So you can experiment over time to see what is best for your particular tank.

It's also more cost effective, and you are not loading up on excess K, which is in every premixed GH booster.
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post #8 of 29 (permalink) Old 10-22-2019, 12:23 AM Thread Starter
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Originally Posted by Quagulator View Post
CaSO4 For Ca / gH - 20-30ppm
MgSO4 for Mg / gH - 5-10ppm
KHCO3 or K2CO3 for kH - 0.5-1.0 degrees.

https://rotalabutterfly.com/nutrient-calculator.php - punch in your 50 gallons, and set range for each compound and it will tell you how much is needed.
I'm confused about something with this.

What should I expect the water to test for KH and GH with those numbers above?

-Dennis
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post #9 of 29 (permalink) Old 10-22-2019, 01:04 AM
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I'm confused about something with this.

What should I expect the water to test for KH and GH with those numbers above?
Ca 30ppm = 4.19 GH
Mg 10ppm = 2.30 GH

So total 6.49....but it's not exact science, so should measure somewhere in that area.

KH should measure about what you add. But when measuring 0.5 or 1.0 it's also not an exact science.

Don't be surprised if degassed pH is below 7 even when dosing for KH. All depends on how much CO2 is present at equilibrium.
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post #10 of 29 (permalink) Old 10-22-2019, 01:20 AM Thread Starter
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I'm used to measuring Alk, Ca, and MG all separately so having a hard time wrapping my head around it.

What is with the KH of 0.5-1.0? Shouldn't that be more like 4-6?

-Dennis
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post #11 of 29 (permalink) Old 10-22-2019, 01:37 AM
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I'm used to measuring Alk, Ca, and MG all separately so having a hard time wrapping my head around it.

What is with the KH of 0.5-1.0? Shouldn't that be more like 4-6?
GH is a basically a combination of the GH added from Ca and Mg. So if you measure Ca and know your GH, you can calculate for Mg.

KH and GH are independent of each other.

When you say dosing to KH to 0.5 or 1.0, I am assuming you are dosing to raise KH by that amount.

For instance..........



If I dose pure RO to 1.0 KH it should measure 1.0 KH.......or somewhere reasonably close to that.

Or am I missing something??
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post #12 of 29 (permalink) Old 10-22-2019, 01:39 AM Thread Starter
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A few posts up (the last one i quoted by Quagulator) says to mix to 0.5-1.0 degree. Is degree dKH? I only know kh being referred to in ppm, dkh or meg/l

The Rotala Butterfly calculator asks for a target in ppm.

Sorry i'm being dense! lol
Thanks for the help.

-Dennis
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post #13 of 29 (permalink) Old 10-22-2019, 01:54 AM
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Quote:
Originally Posted by d2creative View Post
A few posts up (the last one i quoted by Quagulator) says to mix to 0.5-1.0 degree. Is degree dKH? I only know kh being referred to in ppm, dkh or meg/l

The Rotala Butterfly calculator asks for a target in ppm.

Sorry i'm being dense! lol
Thanks for the help.
Forget that ppm tab. It's there by default for everything. We are measuring for degrees of KH.

Here's the important part.......MY TARGET IS: DKH....enter in 1.0 and that is your dose.

It will be the same as in my example from Zorfox above. dKH 1.0 and CO3 at 10.69ppm.

I hope that makes sense.
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post #14 of 29 (permalink) Old 10-22-2019, 01:55 AM
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Quote:
Originally Posted by d2creative View Post
A few posts up (the last one i quoted by Quagulator) says to mix to 0.5-1.0 degree. Is degree dKH? I only know kh being referred to in ppm, dkh or meg/l

The Rotala Butterfly calculator asks for a target in ppm.

Sorry i'm being dense! lol
Thanks for the help.
For kH, rotalabutterfly lists ppm in the input box, but it calculates for dKH (and the result will show dKH).
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post #15 of 29 (permalink) Old 10-22-2019, 01:59 AM
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For kH, rotalabutterfly lists ppm in the input box, but it calculates for dKH (and the result will show dKH).
Thanks you explained it better than me!


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