Even after watching the podcast i still dont understand what makes having an overflow box so special. Does it simply prevent the main tank from completely siphoning out into your sump in the event of a power outage? Is that what all the fuss is about?

the point of an overflow box is to bring water from the tank to the sump/fuge..

they are used when tank hasn't been or cant be drilled and hard plumbed

and yes they during an outage the dank will not drain, however some designs may loose siphon during a power outage preventing it from draining when your return water pump is powered back up

does that help?

ooooOOOOOooooo...that turns on some lights for me. Thanks rob

what podcast are we talking about I missed it?

what podcast are we talking about I missed it?
http://www.talkingreef.com/forums/podcast-episodes/1867-top-offs-overflows-podcast-episode-63-a.html

How can I download it I checked , and can only go down to 88.
all so I cant open the video pod casts. I can down load them but cant open them?
what am I missing.
I m not using I tunes just my pc.

the video podcasts have to be played in iTunes or in Quicktime (audio podcasts are standard MP3 and can be played using any standard MP3 player/app)

there are instructions on using iTunes here in the FAQ's
http://www.talkingreef.com/forums/faq.php?faq=talkingreefsite#faq_talkingreefsite_po dcast