Quick question about retrieve speed. If your reeling it in slow like that don't it sink to the bottom and then bounce along on the bottom?

I had read that crappie feed upwards (baits above them) so always keep it above them, thus I have been reeling it in just fast enough to keep it a bit off the bottom (I'm shootin for what i think is halfway between the bottom and the surface but who can really tell with the stained water at t-bird). This is for when casting out away from the boat, not when fishin straight down next to stumps and brush, right? For straight down i keep it above them on the fish finder and kinda bounce/twitch it a couple inches every 10 seconds or so. I don't reel at all then, until it's time to try a new jig/color.