Boat traffic and water flow can pull the barrier up. Sand bags, large rocks or concrete blocks should be placed at each corner and every three feet along the sides. This allows for maintenance during normal lake levels. The frame can be removed and cleaned, then replaced and re-anchored. Cost and availability Burlap can be purchased at most local fabric stores.
Bottom barriers can come loose and float away, causing navigation problems.
Besides anchoring them properly, boaters should move slowly in areas with bottom barriers deployed. Hand raking and removal With the lake lowered, there will be a large amount of exposed plant material along the shoreline. To help dry out these dense mats of weeds, use a rake to pull material off the top and expose the lower layers. If you plan to remove any hydrilla from the lake or exposed shoreline, place it higher on land to keep it out of the water when levels return to normal. Fragments in the water will sprout roots and spread to new areas.