Crystal Blue 5 Lb. Copper Sulfate Smart Crystals 1-Acre Coverage Area Moss & Algae Killer Encode Unique design creates an easy-to-use

Unique design creates an easy-to-use hummingbird feeder combined with a one-of-a-kind look that will be a favorite for both you and the hummingbirds

Cools up to 450 square feet

then check for level

Multiple splitting surfaces

Use for cleaning mold

Crystal Blue 5 Lb. Copper Sulfate Smart Crystals 1-Acre Coverage Area Moss & Algae Killer Encode Unique design creates an easy-to-useEffectively controls most types of algae. Apply by casting copper crystals over floating algae mats, dissolve in water, and spray, or place crystals in porous bag and drag behind boat. Treat a portion of the pond at a time to prevent oxygen depletion.