"Steve Rosenthal" wrote in message
news:liWCf.15020$JT.133@fed1read06...

I have a 29g (US) planted tank which is doing quite well. However I
have noticed that some of the plants are getting Green Algae on their
leaves, especially the Java Fern. I have supplemental CO2 injected
through a diffuser, and all the water parameter look good. Is this a
lighting problem? All the plants are doing well and growing tremendously.
I just don't understand the algae.

Steve

Is it Green Dust or Green Spot? Green Dust Algae is very bright green and
wipes off easily, Green Spot Algae is darker green and does not wipe off
easily. Low Phosphates can cause GSA, what are your P04 readings? GDA you
can reduce with water changes or UV filtering after wiping it off.

A clean up crew can also work wonders, SAE or Ottos.