My HC seems darker than usual, or I think it is. Is it normal for it to be dark(er) green? The lighter green patches are from an emmersed patch *which doesn't seem to be doing so well transitioning from emmersed to immersed *
The darker green patches were in my tank for about 2~3 weeks if that helps. My nitrates seems to be too low as the recommended dosage for a 13g isn't enough apparently.