Right, that's why the waste collector may be a better option. If the collection cup is small then adding a float switch may cause the collection cup to fill in just a little bit and then shut off the skimmer which defeats the purpose. Just when the skimmer is getting going, it shuts off because the collection cup is "full". The waste collector allows you to let the skimmer run for longer as it will only shut off when the waste collector is full and not when the small collection cup fills which usually happens once a day.
If you are looking for something a little larger, we do have a larger model as well.
http://www.coralvue.com/waste-collector-with-auto-shutoff