I use a chiller for a slightly bigger tank. My fans are useless in bringing the temp down.
U can try using fans first, but you'll be amazed how much better the corals do in lower temperature.
lol, i guess different views. i have chaetos in my refugium, and want my nitrates and phosphates to pass through them before being skimmed. that said, i dont think it makes a big difference whether is it skimmer first or refug first.