Phosphate binders, beneficial bacteria, pond dye and UV clarifiers. Treat what algae feeds on rather than the bloom you can already see - advice backed by 50+ years of pond service in the GTA.
Pond treatments for clean, clear, balanced water in Canadian ponds, lakes, koi ponds and decorative water features. Shop pond dye, beneficial bacteria, phosphate binders, ammonia neutralizer, alkalinity boosters, fish food and muck control.
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Treatment help
Fighting a bloom right now?
Send us a photo of the pond and its rough dimensions. We will tell you what is actually happening and what to dose, in what order - treatments are sized by water volume, and guessing wastes product.
1Tell us the waterRough volume, what it looks like now, and whether there are fish
2We build the programmeWhich products, what dose, and the order to apply them in
3You get a written planDelivered anywhere in Canada, with a seasonal schedule
Contact algaecides are regulated pest-control products in Canada, and they only address the algae already in front of you. Kill a bloom and the nutrients that grew it are still there, which is why ponds treated that way go green again within weeks. The approach that holds through a season works on what algae feeds on instead.
Three layers do the work. Pond dye limits the sunlight algae and submerged weed depend on. An iron-based phosphate binder locks up the key nutrient so new growth has little to feed on. Beneficial bacteria digest the leaves, muck and organic load on the bottom before it becomes next month's bloom. Run together, they treat the system rather than the symptom.
The multiplier on all three is oxygen. A well-aerated pond resists algae naturally and needs fewer treatments year over year, which is why we so often end up recommending aeration to someone who arrived asking about chemicals. For suspended green water specifically, a UV clarifier is the one tool that outperforms chemistry outright.
Estimate volume before you doseAverage length x width x depth in feet, then x 7.48 for US gallons. Every product on this page is sized by volume.
Keep aeration running during die-offDecomposing algae consumes oxygen. Treating a heavy bloom without aeration is how ponds lose fish.
Dye is the cheapest preventive stepCutting light penetration slows algae and submerged weed before either becomes a problem. Apply in spring.
Bacteria work on the bottom, not the surfaceThey digest the leaf litter and muck that fuel next season. Results are gradual and cumulative, not overnight.
Some liquids cannot ship in a freezeLiquid dyes in particular. We will tell you before dispatch rather than after it arrives frozen.
Customer reviews
Fifty Years. Thousands of Ontario Ponds.
Join the property managers, golf superintendents and cottage owners who call us first.
★★★★★4.8 out of 5 based on Google reviews
★★★★★
If you have a pond, waterfall or fountain problem, I consider this THE place to go. I am a repeat customer over a decade, and highly recommend these folks. Ryan and his staff have made quick and creative-solution work of our pond and pump systems.
Mike Singleton · Google review
★★★★★
I have had the pleasure of working with Ryan from Fountain Depot for the past year +. He designed and rebuilt our fountain from the ground up. They are a very knowledgeable team of guys. Our condo community could not be happier with the job they did for us. Highly recommend them for all your fountain needs.
Matt J · Google review
★★★★★
Ryan and the Fountain Depot team are phenomenal! I highly recommend them for all of your fountain repair and maintenance needs. Our water feature looks better than ever. They walked us through the repair process, made some fantastic recommendations, and provided us with a schedule for recommended maintenance.
Kathryn Pettitt · Google review
★★★★★
Once again Ryan, Fountain Depot, has provided excellent service and maintenance on our 2 floating fountains. Fountain Depot resolves any issues quickly, effectively and professionally. Highly recommended!
Lee Cornish · Google review
★★★★★
I highly recommend the Fountain Depot. Ryan and his team are incredibly knowledgeable and timely. We sought a floating fountain and underwater lights for our client, and Ryan delivered precisely what our client was desiring. The Fountain Place continues to maintain the fountain, and we have had zero issues.
Brandon · Google review
Buying guide
Questions our techs answer every week
Dosing, timing and fish safety decide whether a treatment programme works. Here is what we get asked most.
Usually not. Contact algaecides are regulated pest-control products in Canada and only treat algae that has already grown. Kill the bloom and the nutrients that produced it remain.
Binding phosphates, limiting sunlight with dye and using beneficial bacteria to digest the organic load addresses the cause. Supported by aeration, that combination holds through a season.
How much treatment does my pond need?
Everything here is dosed by water volume. Estimate yours by multiplying average length by width by depth in feet, then by 7.48 for US gallons.
Email Info@fountaindepot.com with your dimensions and we will work out the quantities. Guessing high wastes product and guessing low means it does not work.
Are these treatments safe for fish?
The dyes, phosphate binders and beneficial bacteria in this collection are safe for fish, pets and wildlife at label rates. Always follow the label.
The bigger risk is oxygen. Keep aeration running through a heavy algae die-off, because decomposition consumes oxygen and that is what actually kills fish.
When should I treat through the season?
Algae peaks across most of Canada from mid-June into August. Start prevention in spring with dye and a routine bacteria dose, and act at the first sign of growth rather than waiting for a full bloom.
A bacteria application in autumn cuts the nutrient load that would otherwise feed next spring.
What works on green water that chemicals will not touch?
Suspended single-celled algae is the one problem where a UV clarifier outperforms chemistry. Water passing through the unit is treated on contact.
It needs adequate flow through the unit to work, so pump sizing matters. Ask us before buying if you are unsure your pump suits.
Do you ship treatments across Canada in winter?
Orders ship across Canada from Markham, typically arriving in 3 to 5 business days depending on province.
Some liquid pond dyes cannot ship during freezing temperatures. If that affects your order we will tell you before dispatch rather than let it arrive damaged.
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