Re: Relationship between CO2, KH, and pH
Like the bagged reef rock at LFS would be good?
Any material containing Carbonate or Bicarbonate will increase the alkalinity of your water over time. Dolomite and Calcite rock are good choices for long term use. You can buy limestone (calcite) and try that, but I'd recommend getting a small piece of reef rock without any algae to avoid impurities. Seachem's Gray Coast Calcite is good as well.
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