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6dkh solution.

plantnoobdude

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17 Mar 2021
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uk
HI, i plan on making my own dc solution, but i want to aim for 45 ppm. at the moment my drop checker is a nice yellow color through out the photo period and that isn't very useful information.

i'm using wikipedia as a source for my 'math'
"An aqueous solution containing 120 mg NaHCO3 (baking soda) per litre of water will contain 1.4285 mmol/l of bicarbonate, since the molar mass of baking soda is 84.007 g/mol. This is equivalent in carbonate hardness to a solution containing 0.71423 mmol/L of (calcium) carbonate, or 71.485 mg/l of calcium carbonate (molar mass 100.09 g/mol). Since one degree KH = 17.848 mg/L CaCO3, this solution has a KH of 4.0052 degrees."

I want to aim for 6dkh, therefore i multiply 120x1.5 is that correct?
so 180mg/l

I plan on dilluting 1.8g in 1l of rodi water.
giving me 1800mg/l
and dillute that by a factor of ten.
with 10ml of the 60dkh solution and 90ml of rodi water.
does this plan sound good? have i gone horribly wrong somewhere in my my calculations? thanks for reading.
cheers, plant noob
 

akwarium

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20 Feb 2010
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Haskerhorne, Netherlands
30 mg/l NaHCO3 equals 1 DKH. So DKH 6 is 180 milligrams per liter of DC-solution.
I make my own DC-solution (KH 3.2) and to make measurements more easy I do it in 2 steps. First make 100 ml with 100 times stronger hardness, take 1 ml of that solution and add 99 ml water.

if you use bromothymol blue as indicator I would aim for an pH of around 6.8 of the solution at the right CO2 level. I find the green colors easier to distinguish.
 

plantnoobdude

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17 Mar 2021
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@jaypeecee hi, I haven't had any issues with livestock not being able to handle co2. The 30ppm threshold estimation is fairly conservative. i have friends who run around 60ppm in some tanks. I also believe tom barr runs 50-80ppm in some of his tanks. with high O2 should be no issue. ofcourse if i see any issue, i will immediately stop as fish welfare comes first. cheers,
 

jaypeecee

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21 Jan 2015
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Bracknell
Hi again, @plantnoobdude

This thread should help to clarify a few potential problems when using high levels of CO2:


I don't have much data about the effect of CO2 on snails, for example. But, I seem to recall having read that Nerite snails are none-too-happy with CO2 in their tanks.

JPC
 

plantnoobdude

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17 Mar 2021
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interesting. certainly wouldn't want that happening to my fish! i'll research a bit more and decide what i want to do going forward. @jaypeecee
 
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