Randy Holmes-Farley
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My Tank Thread
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I am having the same problem. same thing kicked it off. too much alk that caused alot of percipertation, now I can't get the alk to take. it just keeps percipertating onto the equiipment. mag is 1360, cal is 430. but alk can't get it above 9.6 and that's with 135ml of soda ash a day. there is no load on the tank since it is brand new. no corals or inverts.
anyway the reason i;'m posting is "what is recipe 2???? I did a couple of water changes, and did the scraping and vinegar with the tank and equipment but even when I switch to bi carbonate it still won't go higher than in thje 9's. and that's with either 135 ml of soda ash or 280 ml of bi carbonate
Stop dosing alkalinity for a few days and let it decline. That slows and stops precipitation, allowing organics, magnesium and phosphate to coat existing calcium carbonate surfaces and preventing them from being sites for additional precipitation.