dreamwalk
Creator of the InvisoReef
Why only one gallon? A sump becomes part of your tank overall water volume. The larger the sump the more water you have, and the more stable. YOu see, a small tank will be easily upset in water parameters, temperature and all. I would put in the biggest sump I could fit, it's not lie it costs more at your level, and a small 10 gallon tank is like 20 bucks, and what we do to it will be really cool and your friend will need a bib when he looks at your shit all set up like a pro...
I am thinking about space though... I have two tens... I could use one as a sump, but, I didn't think it made much sense to have a sump as big as the DT.
But, drooling friends are a plus XD