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Old 12/28/2017, 07:06 PM   #2
RC Mod
Join Date: Mar 2002
Location: Mountain View, CA, USA
Posts: 87,924
A bit of baking soda will fix the alkalinity problem. I'd dry dosing 1 dKH in the morning, and then checking the dKH in the evening. The tank might consume up to 2-3 dKH per day, so raising the level might require some large doses. This calculator will help with the amount:

I'd be careful about large doses if the tank has any touchy stony corals. They might get cranky.

With respect to the calcium level, I'd check the levels in some freshly-mixed saltwater. Some mixes come with very high levels, and then there's issues with bad batches of salt. The calcium level is very unlikely to cause problems. You can use two syringes and add the results if you'd like a firm number for the level.

Jonathan Bertoni
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