Algae Control
Choose algae control by matching the product to the type of algae you are seeing. Green pea-soup water, string algae, blanket weed, and algae on rocks or waterfalls each need a different algae-control approach.
Algae Control Finder Open tool ▸
Enter the algae problem and pond details. This points customers to the right algae-control category, not a fixed dosage.
Effectively eliminate many types of green water algae, and string algae in self-contained ponds with liquid algaecides. Aeration must be continuous to prevent fish loss.
Dry concentrated formulas utilize the latest in oxygen technology to remove string algae quickly and efficiently from streams and waterfalls- best used as a spot treatment. Use tablets as a preventative in ponds and fountains.
With fish waste, uneaten fish food, sunlight, and the right temperature, algae can quickly get out of control in your pond. Between pea soup green water to string algae in your waterfall, we have the treatments to get your pond back on track. The majority of these treatments will kill the algae for a quick fix, but they will not prevent regrowth. Once the algae is treated, use proactive products such as beneficial bacteria to reduce future growth.
Effectively eliminate green water without the use of chemicals. UV clarifiers are a proven dependable and effective method of controlling algae and harmful bacteria without leaving any residuals in the water. Use an electronic IonGen system to not only control green water but also string algae.
A microprocessor inside the IonGen control panel causes the outermost atoms of copper, silver and zinc to lose an electron, creating a positive ion. The positive ion attempts to flow from one of the Probe's bars to the other and is swept away by the flow of water where the ion can begin to treat the water. Scientifically blended and tested to produce maximum results providing crystal clear water without the use of chemicals.
How to choose algae control
Algae control works best when you start with the type of algae. Pea-soup green water, string algae, blanket weed, and waterfall algae do not all respond to the same product style.
Popular algae control options
Use this quick comparison when deciding which algae-control category to shop.
| Algae-control type | Best fit | Helpful notes |
|---|---|---|
| UV Clarifiers & Ionizers | Green water or pea-soup water | Best for suspended algae that turns the pond water green. UV does not remove string algae from rocks or liner. |
| Liquid Algae Control | Pond-wide algae treatment | Good when algae is spread through the pond. Follow label directions and keep aeration running. |
| Dry & Tablet Algae Control | String algae, blanket weed, and spot treatment | Useful for algae attached to rocks, streams, waterfalls, and other specific areas. |
| Rock & Waterfall Cleaner | Waterfalls, streams, and rock buildup | Use when the main issue is attached algae or organic buildup on hard surfaces. |
| Fountain Blocks | Small fountains and container water features | Best for small water features where a block-style product is appropriate. |
| All Pond Algae Treatments | Comparing algae-control products | Use when you are not sure whether liquid, dry, UV, or specialty algae control is the best fit. |
Algae guide by what the customer sees
Start here when a customer describes the pond problem.
| What the customer sees | Start with | Why it matters |
|---|---|---|
| Water is green, pea-soup colored, or visibility is poor | UV Clarifiers & Ionizers | Green water usually means suspended algae. UV is the best long-term equipment approach for this issue. |
| Long green strands on liner, rocks, plants, or waterfall | Dry & Tablet Algae Control | String algae is attached algae, so spot-treatment products are often the better starting point. |
| Algae is spread throughout the pond | Liquid Algae Control | Liquid treatments are used for broader pond treatment when algae is not limited to one area. |
| Waterfall or stream rocks are coated with algae | Rock & Waterfall Cleaner | Attached algae on surfaces is different from green water and often needs a surface-focused cleaner. |
| Small fountain bowl or container feature has algae | Fountain Blocks | Small contained water features can often use a block-style algae-control product. |
| Heavy algae mats, fish stress, or very large pond | Ask a Pond Tech | Heavy algae removal can affect oxygen and water quality, so product choice should be reviewed first. |
Algae control checklist
Use this checklist before choosing or dosing an algae-control product.
- Identify whether the issue is green water, string algae, blanket weed, or rock/waterfall algae.
- Estimate pond gallons before dosing any liquid, dry, tablet, or granular algae product.
- Remove heavy string algae by hand when possible before treatment.
- Use UV clarifiers for green water, not for algae attached to rocks or liner.
- Follow the product label and do not exceed the recommended dose.
- Keep aeration running when treating algae, especially when fish are present.
- Treat heavy algae in stages when the pond has fish or low circulation.
- Remove dead algae after treatment to help protect water quality.
Helpful algae control links
- UV Clarifiers for green water
- Liquid algae control for pond-wide treatment
- Dry and tablet algae control for string algae
- Rock and waterfall algae cleaner