Originally Posted by
manners
http:///forum/post/2908078
whatt is the best kh level for a reef tank and what do you do if the level is to high or to low?
I recommend 175ppm for most tanks. Very large systems can get by with lower levels.
WHen it get too low (below 100ppm) corals, clams, snails, etc. cannot calcify and stop growing. Lower than that and their skeletons can begin to dissolve. PH may begin to fluctuate a lot with low KH as well.
High KH (above 250ppm) can cause Calcium carbonate precipitation. This will show up on heaters and powerheads first.