Also I have heard of some people running their skimmers on a sort of cycle (only at night or only during the day). Not sure how that works but it's worth an option to see if you can't find a balance between NOT skimming and over skimming. I would NOT run "skimless" just for the sake of some snails though. That's like trimming your R/C plane for straight and level ground handling in order to forsake flight characteristics
Allen
