Green Algae On Gravel | My Aquarium Club

How to Control Green Algae in Pond Water | Tetra Aquarium - Tetra-Fish
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Although not the problem or scourge that red slime (Cyanobacteria), this algae can over take an aquarium in short order and is often an indicator of high nitrates and phosphates.
Although I consider algae growth generally an indicator of a healthy marine aquarium, normally I recommend less problematic algae such as the Macro-Algae as your measure for success.

Macro-algae is the 'plant' and encrusting algae that you see in many experienced saltwater aquarists marine tanks.
Caulerpa spp, encrusting corallines (a group of Red algae resembling corals), Bubble Algae aka; Valonia macroalgae (although bubble algae can become problem algae on occasion as well) are examples here.
Other beneficial algae that do not take over an aquarium include Green Gracillaria algae as these green algae are beneficial for nitrate reduction without the “overbearing problems of Green Filamentous algae which tends to take over an aquarium, often squeezing out your polyps, mushrooms, etc.
Green algae are real pests that can suck up the nutrients in the water leaving absolutely nothing for the corals in your aquarium.
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The green algae can produce fresh oxygen in the aquarium. The fish can breath the fresh oxygen and become happy. The water with a lot of oxygen is more transparent and more clean. The oxygen can create clean water for the fish. Bad algae can grow in the aquarium, if the water has a low oxygen content. The good algae can produce a lot of oxygen. Once Green Hair Algae gets a foothold in a saltwater aquarium, it can soon cover everything in your tank if prompt measures are not taken.
Photo provided by FlickrGreen-Hair Aquarium Algae
Photo provided by FlickrBlue-Green Aquarium Algae
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First things first, know when not to panic. Take a step back from your aquarium and take stock of the plant and animal life. Could you imagine seeing this scene in nature? If a slight layer of green plant material is carpeting plants or structures but not obstructing the view through the glass, then it is not panic time. A little algae is to be expected in any aquatic environment and .
Which algae do you have
Aquarists will encounter four main types of algae. These are diatoms; red algae, a group that includes brush algae and hair algae; green algae; and blue-green algae, more properly known as cyanobacteria.This is not an uncommon occurrence, nor are these actions unreasonable, given the information that most aquarists have. For all intents and purposes, this seems to be some sort of algae outbreak. Even its name, "blue-green algae" says so. However, it isn't an algae. It's actually a strain of bacteria known as (its name derived from its vivid color, which would be beautiful if it didn't signal so much trouble for an aquarium). In addition to blue-green, cyanobacteria can be black or even red.Hello everybody this is boywithafishtank! Talking to you guys about a thing that every aquarist should know in my opinion which is beating Blue-Green Algae ...There are actually several different types of green algae that can be found in aquariums. They can take the form of green hair algae, green spot algae, and green water algae that turns the fish tank into a green fog. Controlling this type of algae is a little easier said than done because each one has slightly different causes of growth and each one requires a slightly different treatment.
Green algae (chlorophytes)
Green algae are green, usually a bright, leafy green though there is some variation. Green algae require precisely the same conditions as aquatic plants, and consequently only become noticeable, let alone problematic, in well-maintained, brightly-illuminated aquaria. They are typically seen in planted tanks simply because those are the tanks with the conditions green algae like.