How was your pond scum problem resolved this past summer? We had a thread
going at one point discussing one of the ponds at the zoo that went Green. I
think you assigned the problem to one of your neophytes.
I had a discussion with some locals last night with a similar problem. Late
in the summer, their pond (called a tank in Texas) tuned green. It is fed by
spring water, so it is not necessarily a stagnant issue. There is a hay field
nearby that gets fertilized and apparently the runoff goes into the creek. I
suggested growing soem floating plants such as hornwort and building a strong
riparian zone. The fast growing floating plants will absorb the water born
phosphates and nitrates. When they overgrow, they can be raked out of the
pond ands used as mulch.
john
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