Bubble Traps in a Sump/Refugium

[SomethingFishy]

So, I am building a refugium from a 29gal for my 72gal bow. Is an 1 1/2inch enough for space between? or can I get away for less or do I need more?

Yours truly, Itchytriggerfingerwithsilicone

 

[GHill762]

my build will have much smaller gaps than 1.5", that's a lot of sump real estate to give up.. I don't have a bubble trap at all now, just a single baffle, and I have no problems with micro bubbles.. the only reason I'm putting one on my new build is because I'm pumping quite a bit more water through it..

 

[robbrouse]

Mine are about an inch.. Works for me.

 

[SomethingFishy]

Sweet thanks guys!