www.Farms.com/UsedFarmEquipment 33 July 2025 | Ontario What is oating in my pond? This year with the combination of a cool wet spring and then a sudden hot sunny streak we are having a lot of customers with pond that have suddenly been covers with foamy green masses. Most of these will be algae mats that have come to the surface. These may have been slowly growing on the bottom for some time now, only now are they visible. The change into sunny dry weather with warmer nights have brought this problem to the surface, quite literally. The next logical question is how do we address the problem. There are two di erent approaches to achieving a solution. Which is best for you will depend on your pond setup, size and how quickly you need to see results. First, let me start by saying that although these algae mats are unsightly and sometimes smelly, they are not generally harmful. The rst approach is reactive management, which generally centers around products that eliminate the algae in the short term but do not address the cause of the algae. This approach is generally used when there is a sudden bloom or the owner is having an event such as a party or wedding and the pond needs to be cleaned up right away. The other product line that can be very e ective for quick solutions are nutrient binders that tie up the food source the algae is thriving on. Products that kill algae are called algaecides, such as Pond Wizard Algaecide. These products are regulated of use by the government, under the cosmetic pesticide ban, and can be used with permit in enclosed ponds and lakes only. We can discuss the process to gain access to these products, just send us an email or call. Many algaecides are copper based, which means that they are not safe for any sh in the carp family like gold sh or koi so they should not be used if you have these species of sh. Another option that can be e ective more rapidly, especially with planktonic algae are nutrient binders and occulants. Binding phosphorus speci cally removes an important food source for algae and by removing it you can interrupt the cycle of algae blooms and die o s. Flocculants then help to move both algae and suspended particles out of the water column to the bottom by clumping them together, which makes them heavier. This also starves and surviving algae of the light it needs to grow and reproduce. Both algaecides and nutrient binders can be used in combination if needed but most pond owners choose to use one or the other depending on their set-up, size and ease of access. We can help you decide which is the right t for you just call or even better drop by with a water sample. If you enjoyed this article, we would also be happy to have you drop by, phone or email to discuss your problems and help you nd right solution for your speci c situation. What is oating in my pond? This year with the combination of a cool wet spring and then a sudden hot sunny streak we are having a lot of customers with pond that have suddenly been covers with foamy green masses. Most of these will be algae mats that have come to the surface. These may have been slowly growing on the bottom for some time now, only now are they visible. The change into sunny dry weather with warmer nights have brought this problem to the surface, quite literally. The next logical question is how do we address the problem. There are two di erent approaches to achieving a solution. Which is best for you will depend on your pond setup, size and how quickly you need to see results. First, let me start by saying that although these algae mats are unsightly and sometimes smelly, they are not generally harmful. The rst approach is reactive management, which generally centers around products that eliminate the algae in the short term but do not address the cause of the algae. This approach is generally used when there is a sudden bloom or the owner is having an event such as a party or wedding and the pond needs to be cleaned up right away. The other product line that can be very e ective for quick solutions are nutrient binders that tie up the food source the algae is thriving on. Products that kill algae are called algaecides, such as Pond Wizard Algaecide. These products are regulated of use by the government, under the cosmetic pesticide ban, and can be used with permit in enclosed ponds and lakes only. We can discuss the process to gain access to these products, just send us an email or call. Many algaecides are copper based, which means that they are not safe for any sh in the carp family like gold sh or koi so they should not be used if you have these species of sh. Another option that can be e ective more rapidly, especially with planktonic algae are nutrient binders and occulants. Binding phosphorus speci cally removes an important food source for algae and by removing it you can interrupt the cycle of algae blooms and die o s. Flocculants then help to move both algae and suspended particles out of the water column to the bottom by clumping them together, which makes them heavier. This also starves and surviving algae of the light it needs to grow and reproduce. Both algaecides and nutrient binders can be used in combination if needed but most pond owners choose to use one or the other depending on their set-up, size and ease of access. We can help you decide which is the right t for you just call or even better drop by with a water sample. If you enjoyed this article, we would also be happy to have you drop by, phone or email to discuss your problems and help you nd right solution for your speci c situation.
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