Advice? Filter sock holder

Ebay has some great options

 

i have one"it holds a 7" filter.25 bucks and its yours.never used it,doesnt come with a filter

 

You can cut a piece of acrylic to fit the top of your 40 breeder and take a hole saw and cut a hole where you need the sock to fit. I might have enough stuff laying around to make it.

 

BRS had a cheap hang in the tank holder that I use. Might want to check it out.

 

I use bubble magus acrylic holders. You have to cut the lip of plastic but they work perfect.

 

http://www.bulkreefsupply.com/cpr-sockit-4-sock-it-filter-sock-holder.html

This is what I have on a 40 gal breeder, no need to cut anything it fits great.