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Posts Tagged ‘Kinds Of Algae’

Sticky: Controlling Aquarium Algae

Most aquarium hobbyists have to contend with the problem of algae growth sooner or later. The problem can come over time or burst out suddenly as algae bloom.  Understanding the kind of algae you might get in your tank is a big step toward fixing any problem that might arise. The first thing to do is to learn how to identify the algae and then follow the protocol to control it.

Kinds of Algae

Brown Algae – This kind of algae is the most common and is usually found in new tanks or low-light aquariums. You can recognize it by the soft clumps that they form on aquarium walls and fittings.  They are also referred to as diatoms and can be removed by scrubbing. Because they feed on nitrates, adding live plants will help as will algae eaters like the Otocinclus catfish or aquarium snails.

Cyanobacteria – Although cyanobacteria are often referred to as blue-green algae, they are really microbes that float through the tank as blue-green sheets.  They are easy to remove and need to be controlled as they can cause the death of fish or plants in the tank.

tank with green algae

Green Algae

Green Algae – Green water in the tank is usually the result of this kind of algae and often comes because of poor water quality.  This is the kind of algae that is referred to as algae bloom and will grow in tanks that are getting too much light or haven’t cycled properly. It usually forms a film on the tank walls and fittings and can be wiped off. Once the water in the tank has stabilized the algae will usually disappear. If it doesn’t, more drastic methods are necessary.

Thread Algae – Long threads (up to 30 cm) hanging on leaf edges are thread algae.  Low iron is usually the reason for this condition. Threads can be removed by taking a toothbrush and twirling the threads around it. Another way to control this growth is with Siamese algae eaters.

Green Spot Algae – Hard green spots on tank walls and on aquarium plants are the difficult to remove green spot algae. They usually occur in tanks which have too much light or are low in CO2 and phosphate. Normally, they are removed by scraping with a razor blade.

Red/Brush Algae – Red algae or brush algae are most likely to develop on slow-growing plants. pH does not affect them and they are hard to remove by hand. The only control known are Siamese algae eaters.

How to Control Algae

The best ways to avoid algae problems is to limit organic waste and keep good conditions in your tank. Regular water changes and limiting fish food to about as much as they can eat in a minute will help. Live plants also use up the nitrates which feed the algae which will keep them from growing. Algae need light, so keeping the tank out of the sun and only using artificial light for up to 12 hours a day will also discourage growth. Another simple and easy way to reduce the likelihood of getting an algae problem is by the addition of beneficial bacteria, which keep the tank clean and non-conducive to algae growth.

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