All my tests are at zero, Except Nitrates are at 20(Do nitrates go to 0 if so how).
I have an undergravel filter with powerhead, a penguin dual bio wheel 350, I use 4 filter pads,
and a fluercent 25w light used for corals.
I have a bar goby(3.5in), a clarki clown(2in), a lunare wrasse(3in), a...