Refugium is TOO SMALL

[Plasticmask]

Okay, so it was my first attempt and so it was very small, an old half-gal Betta tank made of plastic.
Not as confident in my ability to seal things perfectly, I wanted to start with something really dinky in case it leaked or something.
-PLEASE KEEP IN MIND THAT *ALL* OF MY REFUGIUMS ARE ABOVE NOT BELOW THEIR TANKS-
Being the oldest one on the property, it was a very well-populated little fuge and it still is. The problem is, that it's just TOO SMALL for a 29 gallon tank.
In order to replace it, I'd have to put it somewhere else to keep the wonderful little ecosystem alive. But! In order to set that up on the 12g tank, I'm going to have to make a SINGLE HOLE in that lid so I can drain the fuge back into the tank Right about in the CENTER of the lid.
Still in the middle of all of this. The dinky fuge is hooked up and running on the 12 gallon, just not hooked up permanently yet (no hole drilled yet).
The NEW fuge is a 2.5 gallon plastic tank that I am currently sealing PVC to. The last setup you probably remember used soft rubber tubing, the PVC looks MUCH better.
Sidenote: The HOLE that I had to make in the wall of my tank to accomodate the PVC drain (See inset in pic called Simonsfuge07)... nearly KILLED me making it. But it's perfectly lined up and the tank shuts again and so Life is Good.

[tidus10]

Why not use Uniseal instead of the drill and putty method? but I am confused what the question is here. or if there is one at all.. gl with the new fuge

[Sk8r]

I use the middle chamber of my sump---I mounted an external pump and skimmer.