hi. i have a 20h tank. got it brande new 3 weeks ago. i have 2 live plants 2 moss balls. im doing tge nitrogen cycle with fish. i have 4 danios 2 catfish 2 chinease algea eaters. my ammonia is at about 8 and has been for about 2 weeks. nitrates and nitrites bouncing around 0. i feed themonly a little to avoid over feeding. typically when should i start to see the ammonia start drooping?