Why your geyser heats slowly in Tibbi
At 660 ppm, calcium carbonate deposits on your geyser's heating element within the first year of regular use. The element has to push more electricity through a mineral coating to heat the same water - you notice this as slower heat-up and higher electricity bills.
Geyser descaling every every 3 months is appropriate for 660 ppm. For a storage geyser: drain the tank, introduce an acid descaling solution, allow 3-4 hours, flush with 3 full tank volumes.
