hth green to blue shock system

If you are experiencing a severe algae bloom, which has turned your pool green, the hth green to blue shock system can turn your pool sparkling blue again. This two-part system removes the algae that have taken over your pool and then makes it easy to vacuum out. At the start of the season, or if a severe algae bloom occurs during the season, the pool can be treated and returned to its clear blue appearance by using hth green to blue I and hth green to blue II as part of the hth green to blue shock system. For best results, use this product with other hth pool care products. For crystal clear pool water, follow our 4 step pool care program.