I`m in the same boat as you. I have a 36" 65 gallon and want to put a
refugium underneath. The 20 gal. dont quite fit under---I tried already with
empties at LFS. I think there is such thing as 15 gallon and they can just
about fit---you might have to take the doors off the cabinet, but they are
an odd-size that is harder to find. The only sure bet is a 10 gallon, which
I know is probably smaller than you want and is not that exciting.
The hang -on Aqua-fuges are very cool but they are even smaller volume:
about 2 to 4.5 gallons depending on size.
I am considering using a 10 gallon underneath AND one of those hang-on jobs.
That would still only give about an extra 12 gallons or so (allowing for
overflow). that might work for me .I want over 10 gallons per fish (keeping
only small fish) and that might allow me to keep 6-8 little guys.
I have read on the internet that a lot of people just buy big tubs, like
plastic garbage cans (food service safe of course) and use these inexpensive
containers as stand-alone refugiums. I guess theres some way you can conceal
them.
Lastly---on eBay there is a merchant who sells refugiums of many sizes and
shapes. Tank converting kits too. They are very inexpensive ---the catch is
that you have to make full assembly of everything. I dont quite trust myself
to make a water-tight seal for all eternity. But there are plenty of people
who do-it-their-self.
Check them out: USA Refugium. http://stores.ebay.com/usa-refugium
good luck



"Pszemol" wrote in message
...
"Mark Cooper" wrote in message
.. .
I recommend building one. It's easy and inexpensive.
I made one from a 20 gallon long.

I checked the http://www.all-glass.com website, and
they have something they call "20 High" which is
24"x12"x16" - that would almost fit my opening, except
I am exactl 24" wide and the tank might have a frame
little bit wider or be not exactly 24" but 24"+1/8
and I am screwed :-)

But with that height there is some room to play with :-)

Had some pieces of window glass cut to size and siliconed them in. You
can make any arrangement you like, and if you
get hold of a used tank, or if you have an extra one,
it will save you a bundle compared to even a small hang on 'fuge.

Right now the money is not as important as not to have
the tank teared apart just to fit a bigger sump in the
cabinet... So I need to either - make one from scratch
or find some 24" long which would fit giving me more room
than my regular 10 gallons tank I currently use: 20"x10"x12"