refugium idea (Will this work)

[blood_hound]

I would like to try the AC500, do you guys know were can I buy a cheap AC500 b'coz if can still remember an AC500 cost about $80 in most of the store here in calgary. And would anyone donate a chaeto for me.

[Beermaster]

not hijack this thread but where would i find the U tube for this?

[Murminator]

I seen some designs where the used PCV with 2 90's on it and made it square rather than a U. I also seen one where they used the siphon tude from an AC filter.