Collection: Algaecides

Keep Your Water Crystal Clear with the Right Pool Algaecide

Few things are more frustrating than pulling back your pool cover to find cloudy, green-tinged water staring back at you. Whether it is a stubborn bloom that appeared overnight or a slow buildup you have been battling all season, the right pool algaecide makes the difference between endless scrubbing and a sparkling, algae-free pool you can actually enjoy. Our collection brings together proven formulas from DuraChlor, Pool Season, and Qualco to help you prevent and kill pool algae before it takes over.

Choose the Right Formula for Every Type of Algae

Not all algae respond to the same treatment, which is why we carry a full range of algaecide types to match your specific situation. For routine algae prevention, our polyquat algaecide options like DuraChlor Combat 60 and Combat 30 deliver powerful, non-foaming protection that works alongside your existing sanitizer without staining surfaces or leaving residue. If you are dealing with a more aggressive outbreak of green algae, a quaternary algaecide such as DuraChlor Algae Kil 50 Quat offers fast-acting control at an affordable price point. For best results, pair your algaecide with a proper pool shock treatment to restore water clarity quickly.

Tackle Stubborn Mustard and Black Algae Head-On

Mustard algae and black algae are notoriously resistant to standard chlorine levels, and they demand specialized solutions. Our copper algaecide formulas, including DuraChlor Algae Kil Cb7, use chelated copper ions to disrupt algae cell function at the source, making them especially effective against persistent strains. For yellow and mustard algae specifically, the DuraChlor Mustard Eliminator and Qualco Yellow Rid Clear are purpose-built to break through chlorine-resistant cell walls. The CDC's Healthy Swimming program recommends maintaining balanced water chemistry alongside targeted treatments, and a quality algaecide is a critical part of that routine. Keep your pool sanitizer levels consistent to prevent rebound growth after treatment.

Prevention Is Always Easier Than the Cure

The most effective way to kill pool algae is to stop it before it starts. Adding a maintenance dose of pool algaecide weekly during peak swim season keeps your water clear and reduces the need for heavy shock treatments. As Swim University's algae treatment guide explains, consistent circulation, proper filtration, and a reliable algaecide work together to keep green algae, mustard algae, and black algae from ever gaining a foothold. With products ranging from approximately $18.80 to $54.90, you will find the right strength and formula for your pool size and budget.

Browse our full selection of pool algaecides below and find the right formula to keep your water clean, clear, and algae-free all season long. Your pool deserves it.