Blue Green Algae (Cyanobacteria) in Aquariums

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Question: What can be done about Blue- green algae blooms in aquariums?

Answer: We have a lot of Blue Green algae problems in the lakes here in Oregon (it is not even a true algae, rather modified bacteria; Cyanobacteria). I understand that the out breaks have differences from aquariums, but there are similarities too. I did research on this subject (including reading the local newspapers about treatment and control in our local lakes). Two points that were made several times are:

[1] Heat, high summer temperatures, and poor in flow and out flow of water seem to induce an outbreak. This also relates to the Redox Potential.
Fresh water and good Redox potential (-300 mV) seems to play a large role (from my own research and other research articles I have read). In lakes this bloom will usually conside with poor inflow and outflow of water. This also causes a change in trace element content as well as Redox.
This can then be applied to aquariums in that maintaining regular water changes, a GH over 100 ppm (for calcium and trace elements) as well as the correct Redox (UV Sterilization helps here too), will all work towards prevention and eradication of this problem.

[2] Nutrients, the amount of nitrogen based and phosphate nutrients need to be reduced.

As this relates to aquariums, I would increase circulation, clean and vacuum the bottom every other day, cover the aquarium from light for three days, reduce the temperature, consider UV Sterilization to kill free floating spores, and reduce the nutrient level.

CYANOBACTERIA BASICS;

Knowing more about this "algae" is important for eradication:

Cyanobacteria are from the phylum Cyanophyta of Bacteria that obtain their energy through photosynthesis. They are often still generally referred to as blue-green algae, although they are actually prokaryotes (organisms without a cell nucleus) like bacteria.

TREATMENT (eradication)

With some of the above information in hand, one can now make more informed choices about how to eradicate Cyanobacteria.
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