How do the Mag Flips work?

[Dez]

Just wondering for those who use the mag flips. How do they work. I sort of fooled around with one once a long time ago. Does it work if you can't turn a corner? I have a tank viewable from the 2 long sides with no access to get to the end panels with a magnet. Can you flip it from a flat surface? How does it work with coraline algae. I'm just starting to get coraline growth now, so I'm just planning ahead. Thanks.