Originally Posted by Edward
This top section developed after the chlorinated water change in the following 3 days. Old growth was not effected. Before that, water changes were done frequently to avoid rapid water parameter change over the carbon cartridge. The lighting was 2Wpg PC in reflector above 50gall aquarium.
What was the Chlorine or Chloramine levels in the tap and what fraction of water change did you do, eg what were the levels in the tank and time of exposure??
New growth impacts of chlorine have several potential issues.