Last night I was done with my 2nd dirty tank that has been really dirty for weeks. I removed most of the plants, vacuumed, added 3/4 inch of BDBS. Then I separated the dwarf chain swords and replanted then. Did another vacuum and added a small HOB. Today the tank looks lots better. Not a lot of peat in the water, on the glass and covering the plants. But those chain swords love the real dirt!