Nutrient Management

Controlling nutrient levels in a pond can be an effective management tool for controlling nuisance weeds and algae. Phosphorus, nitrogen, and, to a lesser extent, potassium are used by aquatic plants. Phosphorus is often the limiting nutrient in ponds. One gram of Phosphorus can give rise to about 1,700 grams of algae mass or 140 grams of dry algae! That is a very small concentration!

Nutrients enter ponds in several ways. It is here that our biologists here at ABI look to discover remedies to limit or in some cases eliminate the nutrients from reaching the pond in the first place. The following are descriptions of some management methods ABI may recommend

Nutrient Precipitation:
Water bodies that are becoming or have high levels of phosphorous may benefit from Bio Boost Phosphate Cleanser applications. This material precipitates phosphorus from the water column into chemically unavailable forms in sediment.

ABI Sediment Blocks may also be recommended for reducing total phosphorus levels while increasing overall water clarity.

Aeration:
Aerators influence the rate of oxygen transfer from air to water by creating turbulence and increasing the surface area of water in contact with air.

Septic Systems:
Septic leaching fields are designed to allow bacteria and minerals to filter the wastewater before it enters the groundwater, stream, or lake. Tests are done to determine the amount of phosphorus entering the pond from septic fields.

Storm Runoff:
Runoff in the form of drainage can be a source of pond contamination. ABI has several ways in which we can effectively catch a portion briefly to allow the nutrient levels in the runoff to be reduced.
Wildlife:

Canada geese feed on new grass sprouts and other plants. The major problem with geese is their excrement contributing to the eutrophication of a water body; therefore, their presence should be discouraged. ABI may recommend various control methods to limit the presence of geese.

Proper Construction
Good pond management actually starts with proper construction techniques. Site selection, the size of the pond, intended use, subsoil type, and many other factors must be considered before building a pond.