Well according to the so called experts Cyano
is a sign of a healthy sandbed
is an algae and bacteria living together. Once the enviroment is skewed in thier direction it will never go away. It comsumes nutrient 500 times faster then the next best Algae. In order to skew things in thier way the following must occur. Could be one or all of them combind.
1> Lighting. As lights get old the begin to shift to the red spectrum. The red spectrum is the ultimate source of food for the algae form of Cyano
2>Water flow. The algae portion of Cyano
has no hold fasts, thus it blankets its territory, thus in order for it to grow and flourish it needs an area where to much water flow wont screw up its growth.
3>Nutrients. Most of all phosphates but it will utilise almost any kind of nutrient, and do it well. Over feeding, poor water quality(as in not ro
), high bio load (as in lots of fish and lots of fish Poo). Also a poorly running DSB
( not enough bugs, or really not enough of the right kind of worm).
check these, fix them and you wont have a problem.
On the DSB
one thing to realise is that it wont work if it doesnt have the right kind of worm in it. Most folks think that bristle worms, or pods
, or stuff like that will make a DSB
work. This is NOT true. A dsb
works by transfer of nitrates from the oxygenated zone down to the anoxic zone. All Bugs will not go past the oxygenated zone, with the exception of ONE type of Polychate. If you dont got it the bed dont work, simple as that.
hope it helps