Divide substrates in established tank.
Hey all, does anyone have any advice on divideing substrates in an established tank! I find lots of articles on scapeing in an empty tank but none in a existing tank. Ideally I'd like to add a sandy beach in the front where you see the lone dwarf lilly. My current substrate is eco complete. This will be my second scape in this well established tank, draining and moving fish will not be an option.