Hi, I would recommend 2 ...

Hi, I would recommend 2 options:- 1. a small paddle aerator, this will oxygenate the water and also disrupt the eplimnion. The algae require this warm upper layer to photosynthesize, and then drop to the bottom of the pond overnight to assimilate nutrients. Disrupting the layers disrupts this growth cycle. 2. ultrasound is also very effective. LG do one that runs on solar power so running costs are virtually nil. http://www.lgsonic.com/ Hope this helps