I actually prefer it. I've got a large piece in my 55. I've read that activated carbon will help keep the tannin level down. I like the yelow water, I think you get a better appreciation of the camoflage with the dark water, with dark driftwood and background. I have 3 severums in it, with one small pleco and 3 corys. The two large severums actually just spawned. I didn't know it untill I was moving one of the pieces of driftwood, as they were injuring themselves on it. I smashed some of the eggs, so they ate them, think it was the female. They have been busy this past week clearing out a depression in the gravel for their fry. And have been quite aggresive to the smaller one, to the point that he doesn't even eat. I'll be moving him to another tank if the wife will let me have one, otherwise, he'll be going back to the store.