Please help the new guy on the block. 75 gal. w 10 gal wet,dry. I was lazy with my water test because my lps, clam, fish, monti,looked as good as any picture I've ever seen. Then out of the blue I did my checks. PH.8.2 ,ammonia 0, NO2-0, NO3 10ppm, dkh 7, but my calcium was 340. so that night I...