Refugium for 20 Gallon long?

[20Gallon]

I have a 20 gallon long, my space is extremely limited but I'd like to have a refugium. Any ideas/suggestions?

[Im SpSing]

how limited? maybe a small 2.5 or 5 gallon tank would be perfect.....

[20Gallon]

I'm real limited, I'm thinking of possible HOB ideas?

[Ironsheikh]

buy a cpr hang on refugium --problem solved

[20Gallon]

Iron,

Do you have one on your 20 gallon? If so can it handle the weight of the CPR aquafuge?