Dosing HCL, post your experiences - Page 5 - The Planted Tank Forum
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post #61 of 68 (permalink) Old 05-01-2019, 03:14 AM
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Originally Posted by cl3537 View Post
Sad to say after 8 years of research in Chemistry I have forgotten most of it as well.
I get this all too well.

Relearn enough to handle atomic weights and my own dosing spreadsheets.
And of course some of the long forgotten math involved!


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post #62 of 68 (permalink) Old 05-27-2019, 04:33 AM
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A dying thread yet to be revived!

Inert sub in the 80G was dosed for a 1dKH drop.
First time for HCl in this tank, dosed and it sticks!

The 33G with capped soil slowly creeps back up.
About .5dKH every week or two.

Note: an active substrate changes this game a little bit.
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post #63 of 68 (permalink) Old 07-06-2019, 01:26 AM
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Warning: last attempt @ thread revival!

I have no updates other than an occasional bump to the capped soil tank.

Using only RODI I have to add a dash of alkalinity to the 80G.
This dash is only a .5dKH rise just to stay above zero.


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post #64 of 68 (permalink) Old 07-06-2019, 02:32 AM
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A dying thread yet to be revived!



Inert sub in the 80G was dosed for a 1dKH drop.

First time for HCl in this tank, dosed and it sticks!



The 33G with capped soil slowly creeps back up.

About .5dKH every week or two.



Note: an active substrate changes this game a little bit.


I would think youd wanna remove all dKH for an active substrate if its realistic/safe.


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post #65 of 68 (permalink) Old 07-07-2019, 03:17 AM
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I would think youd wanna remove all dKH for an active substrate if its realistic/safe.
The main tank is 80G BDBS only.
My 33G gallon is capped soil so it creeps up slowly.
Extras go to the 33G unless they will survive the 75G low-tech.
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post #66 of 68 (permalink) Old 07-09-2019, 02:01 PM
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I haven't tried this on my tanks yet since I couldn't find the right acid at my local hardware store, but I made a spreadsheet with calculations for how much to dose. It seems to roughly match what previous testers were working at, eg. 6ml per 20gal drops 2dKH -> 1.5ml per 10 gal per dKH. My calculations are giving 1.35 mL per dKH per 10 gallons, or 0.36 mL per dKH per 10L, assuming 31% acid. This is slightly more conservative, but should be more accurate assuming you can get precise hardness measurements (I get mine from the local water quality report which gives CaCO3 counts in PPM).

Here's the spreadsheet where you can enter your tank/WC water volume and get the required dosage. Use with caution and proper safety equipment.
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post #67 of 68 (permalink) Old 07-09-2019, 02:19 PM
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Here's the spreadsheet where you can enter your tank/WC water volume and get the required dosage. Use with caution and proper safety equipment.
SpringHalo, could you also add CaCl2 ppm addition?

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post #68 of 68 (permalink) Old 07-09-2019, 03:00 PM
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SpringHalo, that is very nice! Can you please add Cl2 ppm increase?

1 dKH drop:
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Last edited by Edward; 07-09-2019 at 03:37 PM. Reason: ...
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