There are very good scale ...
Published by Daniel Schmal
There are very good scale inhibitor for calcium carbonate and/or sulfate (for example: Gengard line from GE Water) . The silica cause problem in the cold section of the system ( cooling tower, fill of tower), but silicate cause some problems in the hot section of the system ( heat exchange) . To silicate, we need to respect the solubility limit of magnesium silicate and magnesium/calcium silicate. There is system where is possible to simulate this situation in the cooling water system.