Why does SP function only up to 25 grains per gallon hardness?
All our calculations are made based on a hardness of 25 grains per gallon. (80%+ OF ALL INSTALLATIONS FALL INTO THIS CATEGORY). his product is also useable with harder water. Units function successfully with 50 gr/gal. 25 gr./gal. is a value based upon the required amount of SP granulate, e.g. 2.5 liters of SP media is enough for a flow rate of up to 1,000 liters/hour with a hardness of 25. For harder water, an appropriately greater amount of SP Catalyst Media must be used. This is a simple calculation if you should encounter hardness above the norm levels.
