But it’s worth checking it if your corals are dying. Calcium should be around 400-500 and magnesium 1300-1500. If they are under these values change water or use buffers. If they are over, you’ve overdosed buffers or your salinity is too high. Check you Reverse Osmosis source water...
The filter is what removes all the contaminants from your water, so if it’s not changed often enough, your water will not be as clean as it should be. Most filters need to be replaced every six months to a year, depending on your filter type. Flush the System Every Three Months In ...