Ray1214· Summer and Alyssa's Daddy
I guess the Hach kits are great but I like the Hagen kits for Calcium. My sailfert kits are probably more exacting , but I have problems with the color scale reading. However i can't stand the Hagen Ammonia and Nitrate kits, they don't do saltwater correct IMHO. Even though they are great for Freshwater.