Pond Algae Control

Pond Algae control, what are the methods used to rid your garden pond of algae?

Reduce the sunlight that your pond receives.

Reduce the sunlight by adding shade to your garden pond.

A fifty to sixty five percent of shade will clear up the pond water.

This may be accomplished buy adding shade trees or an ardor to the landscape surrounding your pond. But this may not be practical or desirable for your pond or the landscape.

The percentage of shade may also affect your aquatic plants or the overall look of the pond.

By just adding plants to shade your pond, you will not only help the control the pond temperatures but naturally control some of the algae bloom.

Algae bloom will occur when temperatures soar in the summer, covering a pond in a matter of hours. Once the sun sets, or a cloudy day comes along the algae begin to die, adding to the organic matter in your pond, decomposing and consuming yet more oxygen.

Pond algae control by reducing the nutrients.

By reducing nutrients in the water you will reduce the food source for algae to bloom. But when you feed the fish or fertilize your aquatic plants this will also feed algae that is in the pond water as well.

A biological filter will have no effect on the level of nutrients in the water. A biological filter is not capable of removing nutrients it only converts ammonia to nitrate, which is still nitrogen: a good food source for algae.

Pond algae control with aquatic pond plants.

Aquatic pond plants will also reduce algae in your pond. Pond plants act as natural oxygenators and submerged aquatic plants can be the best at this.

Plant life converts carbon dioxide into oxygen and submerged aquatic plants are very good at competing for carbon dioxide and providing oxygen rich water that starves algae. Not only do they provide oxygen to the water, they will also compete with the algae for nutrients. Garden ponds need aquatic plants for a healthy balance.

Chemical treatments such as pond algaecides.

Pond algaecides are expensive and potentially lethal to your plants, fish and other aquatic pond life like frogs and even birds if the wrong dosage is administered. In the right dosage algaecides can selectively kill the algae without harming the other plants or animals. However the effect that you are looking for may be short lived and algae may “bloom” again.

Pond algae control with natural algaecides.

Barley straw is a recommended natural algaecide for use in garden ponds. The straw will not kill the algae already in the water but it will prevent the growth of new algae. The amount of straw needed is based on the surface area of your pond and not its volume of water. You will need .5 - 1.5 oz. of barley straw for every 10 square feet of surface area of your pond. Too much straw will deplete the oxygen in the water. Once active the straw will remain effective for about six months.

Barley straw is also very good at ridding your pond of blanket weed. Applying the straw, which should be dried straw, is usually done by placing it in a bag, weighted to sink to the bottom of the pond. The size of the bag will be dictated by the size of your pond. If your pond is large, say an acre or more, then you will need approximately 110 pounds of straw or 2-3 bales. Be sure to break up the bales of straw because the chemical process will take place only when the straw begins to decompose. Apply in the early spring before algae has a chance to grow.

Other natural methods of pH control include using baking soda to raise level or vinegar or lemon juice to lower the pH. Water changes will also help to control pH but the best control of all is simply removing uneaten foods and waste if you keep fish. Keep in mind that if your pond is constructed of concrete, marble, or any other stone product,your pH will be higher.

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