Originally Posted by
robert0606
Really not sure , is maroon algae on LR a good thing ? It seems to be growing pretty rapidly.
It is probably Cyanobacteria; or slime algae.
Cyanobacteria is a half alge/half bacteria Bane to the marine aquarist at large. If you meet a person who tells you they have never experienced cyanobacteria and they have kept aquariums for more than a few months, then they are most certainly lying. It is very common and can be attributed to the following conditions:
a) Low Alkalinity; Add buffer
b) Low Flow Rate; Add powerheads, flow, and changes in flow direction
c) High Nutrient Load (Nitrates/Phosphates); Feed less, reduce fish load, install refugium, run Phosguard or DeNitrate removing resins.
d) Underfiltration; Increase protien skimming, change carbon regularly
e) Biological Inbalance; Add cleanup crew to stir and process sand, eat algae and detritus.
Often there are many factors which combine to create a Cyanobacteria bloom. Calcification (New growth in stony corals) will cease untill C.B. blooms persist. Lastly, there is a wonderful "Kryptonite" to the C.B. curse:
Chemi Clean or Red Slime Remover. Both of these chemical products inhibit bacterial cell walls from forming and therefore cease the reproduction of Cyanobacteria. Amazingly they are both completely reef safe, although some filtration must be interupted.
It should be pointed out that I rarely encourage the use of chemical products of this nature. My exception for this treatment is due to personal experience and the value of the product at gaining an edge in the controll of cyanobacteria. Chemical techniques should be used after natural techniques are employed first without success. And instuctions must be followed carefuly!