Still trying to get my DIY sump done ... got a big hunkin' piece of 6" PVC today ... 2 feet long. That will hold my filter socks, plus other stuff. My sump will probably be a 29G tank, maybe a 25G.
This sump is for a 50G high-tech CO2 tank. My questions:
1) This tank is not drilled, so I need to buy a hang-on overflow box. I've seen a lot of mentions of CPR brand ($100), but found Eshopps ($46 on sale, cheapest) and a Marineland Tidepool SOS ($65) also. If these brands are all fairly decent, I would probably buy the Eshopps (my money is not unlimited at this time ). The CPR brand also has an optional little pump that is supposed to remove built-up air. Have you all found this to be necessary? The CPR brand is also adjustable, not sure if the other brands have this feature. Any recommendations on brand of overflow?
2) My filter socks will leave about 8" at the bottom of my PVC pipe to play with. I'm thinking 2" of sponge, 3" of ceramic biological thingies and 3" of bioballs. Sound reasonable?
3) How big of a return pump for a 50G tank? My overflow will be anywhere from 600 to 800 gph to be on the safe side. I'm thinking to get a 450 - 500 gph return pump.
I still have a ways to go on this (and I'm going out of town AGAIN this weekend), but I will post pictures when I am done.
Thanks in advance for any advice you can give.