My tank has been running 5-6 weeks. I think I'm close to being fully cycled, as my nitrites dropped (0.5) without pwc after a few days of me ignoring it over the holiday w/e. Today I cleaned plants and vacuumed the 1/2 of the tank gravel that I hadn't previously touched, and did a 50% pwc. My nitrite climbed to 3. Should I be cleaning gravel and plants before I am fully cycled?