Sodium Carbonate Concentration

[cbleehk]

Hi Randy,

I'm preparing the mix for my 180G and am wondering if it's OK to up the concentration so that my 2L dosing jug could last longer, meaning to make it more concentrated and dose less volume per day.

e.g. if my room temperature is always above 20C, the solubility @ 20C is say 30 g/100ml, then the most concentrated I can go is 600g / 2L. This is almost 2x the concentration suggested by your 2-part article.

According to the reef calculator, I'd need to dose ~1.5g to raise 0.1 dKH, which converts to 10ml per 0.2 dKH (change per day).

If I dose 0.5ml 20 times during the night (1/2 hour each dose for 10hrs), would this have any negative effect? Like would the concentration be too much for the corals? Is it better to dose throughout the 24h instead?

30 g/100ml is scientific max, would it make better sense if I drop this down to say 25g/100ml? (and redo the math for the dosing)


Thanks!!


Source about solubility >> https://pubchem.ncbi.nlm.nih.gov/compound/sodium_carbonate#section=Solubility

Calculator output:

 

[Randy Holmes-Farley Verified Community Expert]

I designed the recipe to be readily soluble for home mixing, and still some folks have issues dissolving it all. Making it slightly more concentrated is possible, but doubling the concentration will be pretty hard and make it prone to precipitate if it gets cold.

But there's no harm in trying. You can warm it to get it to initially dissolve if you want.