If you wanted to add some more substrate and its all washed, I've always thought (never been told/read about it tho..) that you could put it in a fish bag, put it at the bottom and just open the bag and pour it over gently... I'd definately put some more plants in there ![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)