mag 5 would be PLENTY as just a return.

ohh to pump it to the refuge.....you could just use a maxi jet if you wanted. get the biggest one....it will pump maybe 200 gph.....which is plenty for the refuge. so your going to plumb it higher than the tank? that would be sweet! you could always just buy one of those premade ones that you just HOB of your tank and hook a maxi jet to it and BAM. refuge. After building a refuge three times.......it CAN be cheeper just to buy one made.

yeah....used plate glass the first time.......Loaded it up with sand CRACK. bought some thicker the next time....it still got brittle and broke.....used plexi glass the third time......it bends....but not enough to concern me. I want to make another one.....im still not happy with it. I would like to get a 15 gallon tank......so I can buy a regular stand for my 29 and regular hood so it looks nice and clean. I just dont want to lose the 5 extra gallons of refuge....but it wont be life or death.....it would just suck. also when I build the new 15.....three or four months down the road....im going to get sand from the intercostal waterways here in florida. Its a WONDERFUL mud that should REALLY REALLY help my tank. plus my mangroves would be in love with me.

Im going to get a cooler full......and give it to people locally or who ever wants it. should be sweet.

I dont know soon hopefully. spring break is in a few weeks. I think two.....so probably then. Ill probably go to the beach for a day and grab some. Should be a bit warmer by then.