HASA Algi Ban 10 lb – Professional Pool AlgaecideProfessional Algae Control for Consistently Clear Pool Water Persistent algae problems require a solution that works quickly and reliably. HASA Algi Ban 10# is a professional strength pool algaecide formulated to control and prevent algae growth in residential and commercial swimming pools. Trusted by service professionals, this concentrated formula helps maintain clear, sanitary water when used as part of a regular maintenance program. Designed for