Natural Chemistry Phosphate Test Kit - 10 Tests | 10081NCM DAPT2 so using a secondary oxidation

so using a secondary oxidation system is critical and that's why it is Orenda's Second Pillar of Proactive Pool Care

Bottom Cap: open w/ beveled edge

) Also known as: C4335

Warm gray color to complement today’s brown or gray tone pool

Natural Chemistry Spa Alkalinity Increaser - 2

Natural Chemistry Phosphate Test Kit - 10 Tests | 10081NCM DAPT2 so using a secondary oxidationNatural Chemistry Phosphate Test Kit, 10 Test Strip Package, intended for residential homeowners for low volume testing. If you need higher testing, please see Natural Chemistry model 10080NCM for the 100 test Phosphorus Test version. Testing phosphate levels ensures you can eliminate phosphate when it rises to high, preventing algae blooms from occurring during warmer weather and heavy pool use. Don't forget to make sure you have Phosphate Removers