Flockfix cartridges are designed to...
Flockfix cartridges are designed to assist the filter in removing small suspended particles to ensure sparkling clear water.
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for all swimming pools with the sand filter
Immediately after the second or third washing, add to the dispenser, one cartridge for each 40-50 m3 of water. Adjust the pH to 7.0-7.4 first.
Use only with sand filters!