I really hate vacuuming tanks. I can't ever get those stupid pain in the #$!@%@#%!#%$^ vacuums to work right, and I finally got tired of using it. So, I came up with a great solution... no vacuuming required for those things! I just randomly stir the water and those filters kill the need for that son of a @#!$#$!$%!@% vacuum.