[neurozy]

I just started my first saltwater tank:
10galon salt water tank w/
1.crushed coral substrate;
2.one tufa rock;
3.artificial plants;
4.power filter;
5.thermometer;
6.hood w/ light;
7.bubbling w/airstone;

Currently, there're 2 bluefin demsel fishes in the tank for 2 weeks;
test water every 2 days;
Ph=8.2;
NH3/NH4: 0.25 ppm;
NO2: 0;
NO3: 0;
the watertest result has been like this since the fishes were added, even though I add fluid bacteria every 2 days.

I tried to add some dry bactera a couple of days ago, and finally that made my tank messed up. There're some dark brown bacterial plaque growing on the tufa, and even on some substrate sands. The bacterial plaques are growing these days, and today I found some new green plaques on the tufa.

Does anyone know what the hell those dark brown bacterial plaque is? Normal alga, or some bad bacterials? I added the two fishes to trigger N-cycle as a Petco guy told me, but seems I can't get those NH3/NH4 gone. Any ideas please?

Thanks a lot!