Right now I vac all the open substrate with wc's and I move all the different driftwood to get under about once a month. It looks lush, but the majority of the substrate is actually still open for cleaning. Besides the discus I have a good clean up crew of loaches and cories. Since they are all adults I feed sparingly 2x a day. I change 40% water about once a week. This tank is over filtered with an off name canister rated for a 225 gallon, a AQ 70, a 40 gal sponge, and a uv rated for a 150 gal.
I've been tempted to let the wc go longer because when I test ammonia, nitrite, and nitrates are still non existent after as long as 10 days. But being it's a discus tank I really don't want to push my luck too much.