![]() ![]() You can also install netting over the pond to catch the leaves. Leaves and plant matter that falls into the water will break down and contribute to the sludge buildup, so you’ll need to scoop them out regularly with a long handled net before they sink to the bottom. It’s a good idea to use floating fish food pellets so you can see if the food is being left uneaten and scoop out the excess food before it starts to rot. ![]() Popular pond fish like koi can grow and reproduce fast, so in a few years your pond can easily become overcrowded, which leads to an increase in fish waste and sludge.īe careful not to overfeed the fish, because the uneaten food will sink to the bottom of the pond and contribute to the sludge buildup. If you have fish in your pond, the first step is to make sure that the pond isn’t overstocked. If your pond is starting to smell like rotten eggs, it’s a sign that your pond needs a good clean to remove the sludge and improve the water quality. When the oxygen level in the pond is low, it can also harm the beneficial bacteria in the pond and increase the growth of the bad types of bacteria. Most ponds have a thin layer of sludge at the bottom, but if it becomes a thick mass of sludge it can create problems in the pond.Īs the organic matter breaks down it reduces the oxygen level in the pond, creating dangerous gases like hydrogen sulfide and producing an anaerobic (low oxygen) environment that can be detrimental to your fish. It’s usually made up of dead leaves, lawn clippings, fish droppings, dead algae and other waste that blows or washes into the pond. Pond sludge is an accumulation of waste that settles at the bottom of the pond. ![]()
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