SUNSUN CPF-2500 / CPF-10000 Pond Filters w/ UV Advance the water level must be

the water level must be above the pump's minimum water level indicator

Primo SBX

KH in dKH = (1 - reading in step 5) x 16 Alk in meq/L = (1 - reading in step 5) x 5

The solution will turn to purple and finally blue

SUNSUN CPF-2500 / CPF-10000 Pond Filters w/ UV Advance the water level must beCPF2500 CPF 10000 Pond Filter Features, Effective pressure filter with complete UVC UV purifier. Drainage can connect waterways and filter waterfalls. The maximum pressure for work is 3 meters water column. Patented cleaning technology, the filter can be effectively cleaned without water. The latest filter cotton structure design doubles the filtration area per unit volume, maximizing the filtration effect and extending the maintenance period. CPF2500