I have a one acre pond that is 15' at its deepest point. For the past 20+ years, the pond has held crayfish, FHM and Rainbow trout. Other than grass and a few small willows along its banks, to the best of my knowledge, there is no other vegetation in the pond.
During the summer months we have an aerating fountain located in the deep end that is programmed to run for about 8 hours each night when the temperature is coolest. During the winter we have an aerating diffuser installed in the shallow end that is set to run about two hours each day to keep a section of our pond free of ice. The ponds only source of water is rainfall and a small spring.
Last August, for the first time we had a bloom in the pond and the water turned a pea green. You could only see about 6" into the water at its worse. I had hoped that with winter and colder temperatures the pond would clear but as of February 3rd found it to be only slightly clearer with the ability to see maybe a foot or so. I should note that other than the green coloration of the pond water there have been no other changes noted. No floating or submerged vegetation or other material that I have observed. To the best of my knowledge there have been no adverse effects on the trout yet.
I have discussed the issue with my pond supplier that I purchase my trout from and he told me not to worry that he bloom will not hurt the water or the fish.
I am still concerned however. Any information or recommendations would be appreciated