I think from what responses I've gotten to tonight that I'll just scoot over the rocks and gravel vac. I wasn't intending on removing my substrate. Just taking the rocks out to clean under the with the driftwood. To completely empty the tank would not be safe for the fish but would not be a good idea at all. I feed flake food and sometimes the smaller particles get trapped. I think it effects my water clarity. Particles floating and what notI have had tanks up for over 20 years without breaking them down.
Because I do every other day water changes, with regular cleaning of filter media, and regular vacuuming, I see no need to do a major breakdown
I will only break a tank down if it needs repair, or if a disease strikes that needs bleaching of everything to sanitize.