LaMotteŽ Test Kits: Calcium HardnessBecause calcium and magnesium are both major components of the total hardness of water, measuring hardness by itself may not reveal enough. Recirculating aquaculture systems need calcium levels greater than 50 ppm to maintain a fully functional biofilter. Testing takes 2 minutes. 0 to 200 ppm. LaMotte® is a registered trademark of LaMotte Chemical Products, Co. |
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