Thanks for your replies. The pond is very close to the house so I am going to give it a round of chemical treatment. I believe the combination of tadpoles and tilapia in the early stages during cooler weather contributed collaboratively to the dramatic decrease immediately after stocking. I also suspect that the 300 or so unexpected 1-3" tilapia fell prey to the LMB and HBG the few weeks following stocking without YOY BG present. I read Looptechs thread and I would be interested to see what he would come up with if he drug a rake across the bottom of his pond. I suspect there is still a significant amount of algae 3 feet deep based on my experience a couple of months ago.

It seems that the tilapia paired with a quality dye would make a good team in these Northern ponds. In theory, the tilapia would eat the FA in the warmer shallow areas while the dye shades the deeper. Personally I am not a fan of dyes but they are safer than algaecides.




"The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge." Stephen W. Hawking