I use a mag float. But I don't like it. Actually I love the conveinence, but have scratched my glass with it several times and I am real carful. But it does not matter how carful you are, you are bound to scratch it. I now use a paper towel on water change days and only use the mag float in between water chages.

I wish there was a good product that would remove scratches from glass.

Joetee