Water changes and corals exposed to air

[ccCapt]

I thought I would post a few pics of what my tank looks like when I do a water change. I do 20g every 2 weeks. The corals are exposed to the air for 15-20 mins each time. It doesn't affect them at all as it's a common occurance for many corals during low tide.

 

[HN1]

Nice looking tank! Is that green one in the fourth a milli? It looks like it has some rockin polyps!

 

[ccCapt]

Thanks. Yep, the green furry coral is a millie.

 

[Jimbo7]

Does anything slime up? I had a Green Bali Slimer that used to get exposed to air and would make my tank so nasty afterwards.