Provide Some Degree of Shade 4. Use Beneficial Bacteria 5. Keep the Pond Aerated 6. Add Plants. Keep a Good Amount of Fish Anyone can appreciate that fish are a stunning pet and feature to have in a garden pond. Provide Some Degree of Shade Green water causing algae are plants, and like any other plant, they love sunshine. Use Beneficial Bacteria As mentioned before, green water is caused by single-celled plant organisms called algae. Keep the Pond Aerated Aeration devices are a useful way to increase the amount of oxygen in your pond that helps beneficial bacteria to break down and eliminate green water algae.
Add Plants Having a sufficient amount of aquatic plants in your pond allows for more absorption of nitrates produced by fish from excrement and food waste. Related posts 25th May.
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You also have the option to opt-out of these cookies. But opting out of some of these cookies may affect your browsing experience. Water problems are more common when fish are added to a new pond before this balance has been achieved. The green might return as a slight haze for a few weeks at the beginning of each season.
Green scums on the water surface and long strings of weed are a different type of algae - see our item on Blanketweed. Persistent Green. Green water can be a more persistent problem in shallow ponds; in those pools exposed to continuous sunlight; and in pools where nutrients wash in from surrounding soil. If your pond needs regular topping up with tap water, then nutrients in the tapwater phosphates will also encourage algae.
It will also occur if larger fish are constantly stirring the pool base or disrupting the plants and balance of wildlife. Feeding too much fish food, or overstocking ponds with fish, will also increase problems with algae. Check that green algae really are the problem by filling a jam jar with pond water and letting it settle.
Although green water can be treated with algicide and flocculating chemicals, these are short term solutions and can have side effects, especially if used without accompanying filtration. If green algae die back all at once, they can pollute the water and use up valuable oxygen, harming fish. Skimmers help to reduce the need to clean the bottom of your pond as often because they continually skim the surface of the pond, preventing leaves and debris from sinking to the bottom.
It also makes filter and pump maintenance mush easier. Bottom drains are also becoming more common in ponds because they continually pull waste from the bottom of the pond and put it into the filtration system where it can be easily removed.
Bottom drains practically eliminate the need to manually clean or vacuum the bottom of your pond. A fairly new product that naturally clears ponds is Nualgi. Nualgi is not an algaecide, once added to the pond it creates a bloom of Diatom algae the good kind! The diatom algae bloom out-competes nuisance algae for CO2, Nitrates, Phosphates and other nutrients, causing the bad algae to die off.
We have had good results with it here. As we already mentioned, fish are a major source of the nutrients that feed algae. If you are having reoccurring or constant algae problems, it might be time to reduce the number of fish in your pond.
It can be difficult to part with koi or goldfish that you have had for a long time, but if you have too many fish, this can also cause problems with water quality which leads to sick fish or even sudden die-offs after spawning or during winter. Give a few fish away to friends or neighbours with ponds. Sell or give away your fish by placing an ad on a local newspaper or online.
Once you have reduced the number of fish, try to resist the urge to buy more. If you have only goldfish in your pond, try feeding them less food. In most ponds, there is an an abundance of natural food such as algae, worms and insect larvae that goldfish can feed on. By feeding your goldfish less food, they will still be healthy, but they will produce fewer babies.
Not only do plants directly compete with algae for the nutrients in your pond, they also shade the pond, provide shelter for fish and help to create a more natural environment. The more plants you have the better, however some plants are more effective at reducing nutrients.
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