A healthy balanced biodiversity of aquatic vegetation is a sign of a healthy lake. But when lily pads start to encroach on docks and impede boat access, and floating weeds become so excessive that they get caught up in the propellers of boat motors, you have a problem.
That’s because there are too many available nutrients to fuel excessive weed growth.
Rooted weeds need sunlight to penetrate to the bottom for them to germinate so they will tend to proliferate in shallower areas. If there are a lot of nutrients but the lake has steep banks and shores and is therefore mostly too deep for rooted weeds, then floating weeds will proliferate.
The weeds die off in winter, fall to the bottom and decompose to form organic nutrient rich muck again. So nutrient recycling fuels this annual boom in weeds.
New organics are added from agricultural runoff, wastewater and septic discharges, and leaves every fall so the depth of nutrient rich organics increases year after year.
Once we understand that the real problem is the recycling of nutrients; (decomposed sediment organics produce weeds and algae that then die off, fall to the bottom and decompose to form nutrients again), it becomes obvious that the best way to make things worse is to promote nutrient recycling.
There are a number of ways to do this
Herbicides quickly kill weeds so that the dead weeds fall to the bottom to decompose and perpetuate the nutrient recycling.
Algaecides quickly kill algae so that the dead algae fall to the bottom to decompose and perpetuate the nutrient recycling.
Such as alum that clear the water and precipitate phosphorus down into the sediment to perpetuate nutrient recycling.
Conventional Aeration raises dissolved oxygen levels in the upper layers of the water column. Because phosphorus precipitates out of the water at higher dissolved oxygen levels acts in much the same way as chemical precipitants by recycling phosphorus back into the sediment.
The difference is that chemical precipitation tends to retain phosphorus in the sediment a little longer, whereas when Conventional aeration fails to oxygenate the sediment phosphorus rapidly becomes dissolved in the water again.
SIS.bio’s remediation program does the following:
In this way, excessive weed growth is controlled by reducing available nutrients that promote excessive weed growth