Thanks everyone for the help! It would appear that after 5 weeks I'm fully cycled. Ammonia near 0, nitrites near 0, and nitrates near 0 as well. I never really had any nitrate growth, but I'm going to assume that's a result of having added parrots feather, water lettuce, and water hyacinth a couple weeks ago. Now the fun part...time to shop for a couple turtles and a couple more koi!