Sounds like your pond is moving in the right direction. The forage pond muck is probably providing a little fertilization.
You might make yourself a secchi disk and keep some reading/date records. If your RBT are happy with your full annual cycle, then don't change a thing. If you need a little more fertilization next year, then you can add some organic fertilizer and monitor another annual cycle.
Good luck, and have fun with your rainbows this year!
