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help with this algae/ scum on the surface
- To: <aquatic-plants at actwin_com>
- Subject: help with this algae/ scum on the surface
- From: "Loh Koah Fong" <kfloh at ntu_edu.sg>
- Date: Wed, 26 Jun 2002 12:23:52 +0800
- Thread-index: AcIcyPF+V34yx4j9EdauCAAQpKqvYQ==
- Thread-topic: help with this algae/ scum on the surface
Some time back, I noticed some kind of greenish powder on the surface of my 4ft tank. Covering maybe 60% of the surface. No smell. See the picture of the algae at http://www.ntu.edu.sg/home/kfloh/photos/what_algae.jpg
It caused my fish to go to the surface in the morning as if lacking of oxygen. It has wiped out my entire stock of 20+ Harlequin Rasbora and some Cardinals. Before they die they are swimming weakly and haphazardly near the surface. The scum seem to be concentrated at a corner of the tank above my E. bleheri which has some leaves growing out of the water. The water is quite stagnant over there.
The tank was set up 2 years ago and nothing significant was done lately. Currently I am using DIY CO2 which I run it through a reactor non-stop. It has not cause problems before. And I am using a skimmer to remove the scum weekly.
I wonder how it originates and how to remove it?
Thanks for any help.