How much is a good level of live rock? I've got a 12g nano DX, and am having problems keeping ammonia and nitrates in check, even doing 3g water changes every other week.
It has been a really long time since I've dealt with a small tank. I took advice here and removed the sponges, bioballs, and carbon, and replaced that with about 3" of liverock in the middle chamber. There's also a purigen bag in there.
The first chamber has a nano-skimmer, and the third chamber is just the pump and a heater.
Where can I get a light that will mount across the back if I wanted calurpa? And how deep do you put live rock in there?
Thanks!