API Pondcare Algaefix Algae Control
API Pondcare Algaefix effectively controls green water algae blooms, string or hair algae (Cladophora), and blanketweed (Oedogonium) in ponds with live plants and fish. It is fast-acting, helps control algae growth and prevents new algae formation, and supports the resolution of existing algae issues.
Registered with the EPA, this product is safe for use in water gardens, ponds, and ornamental fountains that contain live plants and fish.
| Algae Types Controlled | Application |
|---|---|
| Green water algae | Direct application in pond water |
| Cladophora (string or hair algae) | Targeted treatment in affected areas |
| Oedogonium (blanketweed) | Regular use to prevent spread |
FAQ
Can API Pondcare Algaefix be used in ponds with fish and live plants?
Yes, API Pondcare Algaefix is safe for use in ponds containing live plants and fish.
How quickly does Algaefix start working?
API Pondcare Algaefix is fast-acting and begins controlling algae growth within a few days of application.
Is this product registered with the EPA?
Yes, API Pondcare Algaefix is registered with the EPA for use in ponds and water gardens.

Stephanie Black –
Used Algaefix in my koi pond with live plants. It reduced green water and string algae within a week. The fish showed no signs of stress. Works well with existing plant life.
Blake Rampling –
Felt the algae control was noticeable after two applications. No fish movement or plant damage. Good for preventing new growth in a medium-sized pond.
Vanessa Springer –
After a summer of algae issues, Algaefix solved the green water problem. The blanketweed didn’t return after regular use. Easy to mix and apply.