Flyswatter beat me to it on the aeration solution. But if you go that route, do your homework. There are lots of options. Hell, a friend just uses a submersible pump on a timer. It aint pretty, but works well.
Here is some info on the White Amur (grass carp) for PA.
PFBC link
It explains the process.
List of certified vendors in page 3.
By the way, it's much easier in Ohio. Not sure why you would need a permit to buy in PA when all you can get is the Triploid anyway. Illegal to produce the Diploid.
There are tables and info to figure out how many you need. but if you end up with too many, it isn't much of a problem. They are difficult to catch, but not difficult to see and therefore kill.
Caution. If you have a decent amount of outflow and you don't put up a screen to keep them from getting out, you are just wasting your money. They seem to be attracted to the flowing water and will get out if they can fit.
I had a big problem with cattails, but the muskrats took care of that for me. Now I gotta take care of the muskrats while I still have a pond. Algae has also been more of a problem since the cattails are gone.Tthat and duckweed