I was contemplating this today. Would it be possible to use a HOB
filter as a refugium? I was looking at them on ebay and they are basically the same, the HOB
I have wouldn't be much smaller. If it would work, what would I put in there? Thanks.
P.S. I have a lot of time on my hands right now, as I am just waiting for stuff to arrive. So, I get bored and thought this up. Don't flame me too bad if it won't work, I am new at this, so I just thought I would ask.