Looks nice..
Hopefully the new piece of seed rock you purchase is big. I like minimalist rock work myself but I think you need more. 15lbs isn't enough to adequately house enough bacteria for 30g + sump volume. I'd try for at least 10-15lbs more. If you don't want to clutter the DT, put it in the sump.
Hopefully the new piece of seed rock you purchase is big. I like minimalist rock work myself but I think you need more. 15lbs isn't enough to adequately house enough bacteria for 30g + sump volume. I'd try for at least 10-15lbs more. If you don't want to clutter the DT, put it in the sump.