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Originally Posted by gobytron

Lazy and didn't read the whole thread so excuse me if this is a repeat....

Any chance that with a water change and the addition of carbon your water clarity improved enough to give your coral a bit of a light shock?

Well i wouldnt think so, I run a fluval 305 which has 3 compartments in it. I run a small amount of carbon in each, changine one each month trying to keep it at a constant absortion rate and also I know theres PE now so im not worried but there was way better before, thing was furry.

Originally Posted by whatcaneyedo

This article will teach you plenty about managing magnesium.

Do-It-Yourself Magnesium Supplements for the Reef Aquarium
http://reefkeeping.com/issues/2006-07/rhf/index.php

Use this calculator to find out how much to use. Just dissolve some magnesium salts in fresh water and add slowly to a high flow area of the tank. Do not try to increase by more than 100ppm/day

Reef Chemisty Calculator
http://home.comcast.net/~jdieck1/chemcalc.html

Thanks again, ive got to top up freshwater tonight anyways so i will do that.