I understand that they produce waste.
Perhaps I can ask this in a different way.
I have a 30 G with two clowns about 1.5 inches each, one purple dottyback (skinny, .75 inches long), two damsels, one Chocolate Chip Star, three small snails, and two small hermit crabs. I have about 1.5 inches of LS, 15 pounds of LR, and about two pounds of base rock.
All the following readings were just prior to a water change that I did at one month.
Amonia = 0
Nitrite = 0
PH = 8.2
Nitrate = 5
Think I could add a Anenome?
Thanks,
Brian