HEy i noticed tonight when i was doing some tank maintanance that i have like red velvety stuff growing on some of my LR
. It can be scratched off with my nail but it takes awhile to scratch it off. I also noticed some white build up on my LR
what could that be from. My calcium is a little high but i cant help that because my Salt adds the Calcium. I use Seachem Reefsalt.