Best Algae Treatments

1. API POND ALGAEFIX (32 fl oz) Pond Algae Control – Copper Free – Clean, Clear Water – Up to 9600 Gallons – Safe for Fish & Plants – Water Gardens, Fountains – Natural Active Ingredient – EPA-Registered

API POND ALGAEFIX keeps your pond or fountain clean and clear. It controls algae fast and safely, without harming fish, plants, or pets.

This EPA-registered formula is copper-free and works on green water, string algae, and blanket weed. Use it weekly to keep water clear and reduce maintenance.

2. API ALGAEFIX Algae Control 16-Ounce Bottle

API ALGAEFIX Algae Control is a must-have for any aquarium owner. This 16-ounce bottle is designed to control algae growth and keep your tank looking its best.

It effectively targets “green water” algae blooms, string, and hair algae, ensuring your aquarium glass, ornaments, and plants stay clean. The fast-acting formula is safe for fish and plants when used as directed.

Easy to use, dose every three days until algae is under control, then maintain with weekly doses. Keep your aquarium healthy and algae-free with API ALGAEFIX.

3. Clorox® Pool&Spa™ Swimming Pool Algaecide and Clarifier, Prevents and Treats Pool Algae, Clears Water, 128 Fl Oz (Pack of 1)

Clorox Pool&Spa Algaecide and Clarifier keeps your pool clear and algae-free. It treats and prevents all types of pool algae. Enjoy crystal clear water with less effort.

This non-foaming formula saves you time on maintenance. It works in all pool types, including saltwater pools. Trust it for reliable performance.

For best results, add it to the deepest end with the filter running. Use the Clorox Pool App for expert tips and personalized recommendations.

4. API POND ALGAEFIX (16 fl oz) Pond Algae Control – Copper Free – Clean, Clear Water – Up to 4800 Gallons – Safe for Fish & Plants – Water Gardens, Fountains – Natural Active Ingredient – EPA-Registered

API POND ALGAEFIX keeps your pond clean and clear. It controls algae fast and safely. Treats up to 4,800 gallons with just 16 fl oz.

This copper-free formula is safe for fish and plants. It won’t harm beneficial bacteria or wildlife. Works on green water, string algae, and more.

Easy to use with vigorous aeration. Repeat every 3 days until algae is gone. Then dose weekly to keep water clear and healthy.

5. CrystalClear Algae D-Solv Pond Algae Control, Fast-Acting EPA Registered Algaecide, Use in Fountains & Outdoor Ponds Containing Koi & Other Fish, Treats 46,080 Gallons, 1 Gallon

CrystalClear Algae D-Solv is a fast-acting algaecide that quickly removes algae from ponds and fountains. It’s EPA registered and safe for koi and other fish.

This product controls green water, string algae, and blanketweed. It’s easy to use and keeps your water clean and clear. No need to drain or scrub your pond.

Use it in fountains, ponds, and water gardens. Apply 1 oz per 360 gallons for best results. Weekly doses prevent future algae growth.

6. PoolRx Pool Unit #101066 6 Month Algaecide Treats 20k-30k gallons, Black

The PoolRx Pool Unit #101066 is a powerful algaecide that treats 20,000 to 30,000 gallons of water. It lasts up to 6 months, making pool care simple and effective.

Just place it in your pump or skimmer basket. It kills all types of algae and cuts down on chemicals. Replace it every 12 months for hassle-free pool care.

7. MICROBE-LIFT ALGA08 Algaway 5.4 Algae Control Treatment for Ponds and Water Gardens, Safe for Koi Fish, Goldfish, Plants, and Decorations, 8 Ounces

MICROBE-LIFT ALGA08 Algaway 5.4 keeps ponds clean and clear. It controls algae growth and stops green water. This safe treatment works for fish, plants, and decorations.

It’s 100% safe for pond fish and plants. Use it with good aeration to keep fish healthy. Results show in just 2 days.

Part of MICROBE-LIFT’s pond care system, it works with other great products. Use it for clearer water and a cleaner pond all year.

8. Fountain Algaecide and Clarifier – 8oz – Kills and Inhibits All Types of Algae Growth, Formulated for Small Ponds and Water Features, Treats up to 8,000 Gallons

Fountain Algaecide and Clarifier keeps your small ponds and water features clean and clear. It kills and stops all types of algae growth. One 8-ounce bottle treats up to 8,000 gallons of water.

This non-hazardous formula is safe for plants, pets, and wildlife when used as directed. It does not stain or foam and works well for green water, string algae, and more.

Do not use with fish. Apply every three days until algae is under control, then treat weekly. For maintenance, use .75 oz. per 1,000 gallons every 5 days.

9. API ALGAEFIX Algae Control 1.25-Ounce Bottle

API ALGAEFIX Algae Control keeps your aquarium clean and clear. It controls algae growth on glass, ornaments, and plants.

This fast-acting formula works on green water, string, and hair algae. It’s safe for fish and plants when used as directed.

Dose every three days until algae is under control. Then, use weekly to keep algae away. Made in America for quality you trust.

10. API POND ALGAEFIX (1 gallon) Pond Algae Control – Copper Free – Clean, Clear Water – Up to 38400 Gallons – Safe for Fish, Plants – Water Gardens, Fountains – Natural Active Ingredient – EPA-Registered

API POND ALGAEFIX is a powerful solution for algae control in ponds and fountains. It quickly tackles various algae types, from green water to string and blanket weed algae.

This EPA-registered formula is safe and effective. It’s copper-free, ensuring the well-being of fish, plants, and the surrounding ecosystem.

Treats up to 38,400 gallons. Easy to use. Maintains clear water.