BJ, I'm interested in the concentration you recommend for C+ . . . The MSDS recommends 0.6 USG per acre foot, and I usually put 3/4 to a full gallon in a 50-gallon sprayer and spray the whole [7/10 acre) pond. Doing 1:3 sounds like a whole lot of extra chemical, unless I'm missing something.
Also re. grass carp, my experience has been that there are very good reasons not to stock them (witness the variety of places where they are illegal). Most relevant here in Ohio, where they are legal, they are very inefficient eaters of algae and very efficient eaters, especially when young, of many ornamentals, lilies, etc. (although happily not water iris). Obviously for those not trying to garden the margins of the pond, this is not so much of an issue.
