02-28-2010, 09:54 AM
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With calcium at 300ppm and alkalinity at 11 dkh make sure you only add calcium, and do not add the buffer. The BIonic product comes in 2 parts, one of which is calcium chloride. You should only be adding this part of the additive until both alkalinity and calcium are within the desired range. Then adding both parts will keep things balanced for you.
Just to be clear, adding a buffer at this point is a very bad idea.