I've been doing this once a week for some time, could up my regiment to 2 or 3 times a week, but was always fearful to "stir up the junk" too much. Thoughts? I thought this was the same reason why folks say to not re use sand from a tank transfer, because you stir the sand too much and you'll release... idk, bubonic plague on your tank? Any cause for concern on stirring the sand too much?