Sustain Winter Shield

Algae knows no season. They can develop during the winter months and early spring only to be discovered when you remove the pool cover. Protect against algae by applying Sustain Winter Shield at the end of the swimming season according to label directions.

During shutdown, Winter Shield continues to protect against algae development in much the same way as during the swimming season. It absorbs excess chlorine introduced during shocking as part of the closing process. This “shielded chlorine” acts as a back-up reserve to guard against algae development all winter long. Click below for step-by-step guidance.

Closing Your Pool