Techko S189 Ultra Slim Safe Pool Alarm for Kids, ETL Listed UL 2017 Compliant, Indoor/Outdor Weather Resistant, 110db Loud Alarm with 2X Bypass Buttons, Gray, 1Count thirst-quencher and mustard algae

and mustard algae

Screw on Canister Bottom

Natural Chemistry cover free is an advanced mono-layer technology that helps save water and money

Easy grip clip cap on one end with a convenient cap holder on the other end

Do NOT use with biguanides

Techko S189 Ultra Slim Safe Pool Alarm for Kids, ETL Listed UL 2017 Compliant, Indoor/Outdor Weather Resistant, 110db Loud Alarm with 2X Bypass Buttons, Gray, 1Count thirst-quencher and mustard algaeTechko S189 Ultra Slim Safe Pool Alarm for Kids, ETL Listed UL 2017 Compliant, Indoor Outdor Weather Resistant, 110db Loud Alarm with 2X Bypass Buttons, Gray, 1Count ETL listed and approved under UL 2017 standards for Child Pool Safety Law Complies with most city pool regulations: Follows Residential Pools Safety Barrier Guidelines from the U. S. Consumer Product Safety Commission Super Loud Siren: 110db output so you can hear the alarm anywhere in