FISHFARM solutions
(TO BE ADDED)

Sometimes you find a fertilized pond that has always been green suddenly developing a red scum on top. The red color may be permanent, or it may only be appearing in the afternoon while remaining green in the morning. 

 
(a). The problem: Euglena scum covering a fish pond                       (b). Simple solution: Skim it off using dry reed, bamboo stick, or 1/2-inch PVC pipe