Algae bloom – Aquarius-Systems

Algae Treatment Leads to Massive Fish Kill in Lake Isabella

Fri, 01 Dec 2023 18:16:49 +0000

Lake Isabella has experienced a significant “fish kill” due to low oxygen levels following treatment of an extremely high blue-green algae presence.

When the heavy bloom was noted a recommendation was made to close the lake to swimming and boaters and a company was hired to treat the lake with a chemical called SeClear. The following day, hundreds of dead fish were observed lying dead on the bottom and floating on the surface.

Workers went around netting the dead fish. The numbers showed 1,105 small largemouth bass killed, 181,888 bluegill fingerlings, 7,635 larger bluegill, 26 white crappie, 3 grass carp and 10 channel catfish killed. All of the fish were buried in the Village gravel pit.

Copper Sulfate Algae Treatment Leads to Fish Kill in Colorado Reservoir

Tue, 21 Dec 2021 19:30:44 +0000

Colorado Parks and Wildlife is investigating Johnstown officials after their attempt to treat an algae outbreak left nearly 1,000 fish dead.

The Greeley Tribune reports that Parks and Wildlife spokeswoman Jennifer Churchill says a worker put a copper sulfate into the town’s reservoir this summer to treat the algae. She says chemical ended up suffocating 972 fish.

The National Pesticide Information Center says copper sulfate can cause sudden plant death, causing fish to suffocate because of depleted oxygen and clogged gills.

Kitsap Lake Uses Phoslock and Weed Harvesting to Reduce Algae Blooms

Fri, 05 Nov 2021 20:43:44 +0000

It’s a familiar sight to residents living on the shores of Kitsap Lake in Washington: each summer, around the beginning of June, a bright green algae begins to creep across the water. These blooms can be harmful to people and pets and have forced closures of Kitsap Lake and its beaches every year for the last five years

This year, a different approach was taken. Starting in June, contractors sprayed the lake with a compound called Phoslock, which helps remove phosphorous from the water. Then an aquatic vegetation harvester trawled across the south end of the lake, chopping down underwater weeds and hauling them to shore. The goal – to remove as much phosphorous from the lake as possible.

Sediment in the lake – from decomposing weeds, lawn fertilizer, stormwater runoff – produces excess phosphorous, which acts as fuel for algae blooms. Relatively few outflow points on the lake result in a slow turnover rate of water and poor nutrient cycling, according to a 2011 Kitsap Public Health District report.

The harvester removes plant life and opens the water up to circulation, allowing for the water to mix and more sunlight to reach the deepest parts of the lake