I have a 1 acre pond that was costructed in 2006. It is spring fed and chara has taken over. The aggressive spring makes dye ineffective since it is all gone (out stand pipe) in 10 days or less. The pond is 14 feet deep, clay bottom, crystal clear, and cold. I have no access to electricity at the pond. I have a windmill for areation and the fish are doing well. I can remove enough stand pipe, drain 4 feet, and re attach so chemicals stay in for 6 days, but it looks like this may take serveral treatments per summer. May have some small pondweed as well, but mostly chara, big 10 ft. tall chara thru the middle. what is my best bet for control?
