I use a turkey baster as well, to blow off stuff at the same time I am changing out water, then suck it out with the syphon hose. As far as the ls, I have a diamond goby now that keeps it stirred up, but before him I would lightly stir the very top if there were any brown areas. You really start stirring up ammonia and the nasties if you attempt to stir it up deep, so I never messed with that.