Use the reagent only in sand and cartridge filters.
Drain the water from the filter through the bottom valve and close it. Pour 2 liters of water through the top valve, then add CTX-57 at a rate of 2 L per 10 kg of sand or silica.
The solution must cover the sand by 20–30 cm. When bubbling stops (after 4–8 hours), close and turn on the filter.

ATTENTION!
For proper cleaning, the water must pass strictly through the filter.