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RobbyG, The nitrate reduction reaction in the sulphur chamber drops the pH and that is what allows for the dissolving of calcium in the second chamber. (without the adding of C02)
jim, thanks for posting those shots of the H&S, they are nice as well.
I went with the design above as I didn't want to recirculate the second chamber. I would like to use that coarser sulphur media... Any idea where it can be bought??
I have decided to cycle the unit on 15g of water in a tub (from my tank) instead of throwing it directly 'online'. So that's where I'm at right now. I'm going to do nitrate tests shortly and I'll update then.
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