Review on 🐠 Red Sea Fish Pharm ARE22063 Coral Colors Iron/Trace Supplement-C for Aquarium, 500ml" - "Red Sea Fish Pharm ARE22063 Coral Colors Iron/Trace Supplement-C, Aquarium Water Additive - 500ml by Eric Castillo

Calcium Supplement Dose. I use the Red Sea ABC color test to get an idea of where I sit and add based on the results of that test. Just a warning, be careful and add that you don't overdose as this will damage the corals. Too much will do serious damage. This is for experienced reef keepers. If you are new to reefing, just change the water regularly; This should fill up what you need if you're using a good sea salt like Red Sea or Seachem.