Eshopps NANO Overflow Box, 30 gal tank.
The new Eshopps Nano Overflow Box is a perfect fit for smaller applications. Many hobbyists have smaller tanks they don’t wish to drill, but still want to benefit from the use of a sump. The Eshopps Nano Overflow Box is relatively low profile, measuring 4×2 1/2″, while handling up to 200 GPH.
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Awesome little box! Review by reefmonkey
I was privileged to be a part of creating this little overflow box. I own and use the first one made.
The ratings on it are a bit conservative, Ive had well over 400gph flow through it flawlessly and quietly. I bumped flow up to 525gph and had to quiet the pipe down with a chunk of 1/4" tube but the box and u-tube kept up with that much flow easily.
This is an affordable HOB for those of use who want a sump on a nano that cannot be drilled. (Posted on 2/21/2011)