Blue-green algae

 Subject: Blue-green algae
 I do not believe that blue-green alg
> well in oxygenated water. On the other hand, I can't explain why
> often thrives attached to the outflow ledges of many AquaClears

The worst cyanobacteria infestation I've ever had was on the 
waterfall of my paludarium.  You can't get much better oxygenated 
than that!<g>

Karen Randall
Aquatic Gardeners Assoc.
Boston, MA