5 Steps to Properly Dose Algaecide in Your Pool

Calculate your pool volume in gallons Measure your pool’s dimensions and use the correct formula. Rectangular pools: length × width × average depth × 7.5. Circular pools: diameter × diameter × average depth × 5.9. For kidney shapes, use a free online calculator.

Read the algaecide label for the correct dose Most products specify a dose like “1 quart per 10,000 gallons.” Follow that exactly. Doubling the dose does not kill more algae—it can cause foaming or interfere with chlorine.

Choose the right algaecide for your problem Copper-based algaecides kill stubborn algae but can stain pool surfaces. Polyquat algaecides are gentler and won’t cloud the water. Pick based on what you are treating.

Measure the dose precisely Use a measuring cup or the product’s built-in dispenser. Guessing leads to underdosing (ineffective) or overdosing (foam and chemical imbalance).

Apply the algaecide correctly Pour the measured dose into the pool near a return jet while the pump is running. This ensures even distribution throughout the water.