Anyone hear of calcium levels being between 550 and 620 PPM!!!! I have alot of evaporation in my system and top off with kalkwasser. I use about 5 gallons of kalk every 2-3 days. (about 150 gal total in system). I tested tonight for the first time with a Salifert kit (twice) and it read 620ppm. Then tested with my usual kit a Red Sea and got 550. I have never had higher that 450. I'm thinking that if this is accurate, it must be that the kalk increase to compensate for additional evaporation from the new 30gal frag tank is causing it. I have never heard of calcium levels this high.