If you ever find yourself with a small tank that you would like to add an over flow and sump/fuge to but can't because the glass is too thin or tempered and HOB over flow's are just to big and bulky don't fret. Eshopps has the answer at a very affordable price. Back in May I really wanted to add a sump to my Tetra 10 gallon HalfMoon but couldn't do it because the glass is tempered. I thought about putting in an Eshopps PF 300 but after taking some measurements decided that would just be too bulky and wouldn't look good at all. I needed a small over flow and the search I did turned up a company in CO that makes nano sized boxes at gargantuan prices. If I remember correctly it was around $130.00 + s/h. So I went with a DIY PVC over flow. If you look closely you can see Carni checking out wth I was doing. It failed within a month causing a flood. It was loud and it couldn't handle the flow I wanted. If I didn't clean it thoroughly every week it would lose siphon and fail. So on a whim I contacted Louie at Eshopps and practically begged him to design one. Turns out it had just hit their drawing board and I was pulled in to one of the best experiences of my saltwater hobby/career. Louie asked me to ride along and give my ideas, thoughts, opinions and input on this project. It was a very enjoyable time that lasted nearly two months. Here is the end result, enjoy... Just like it's larger counterparts this nano OF comes with the skimmer box which is adjustable with the nylon wing nut, a 3/4" U Tube, and the overflow box is drilled for a 3/4" bulkhead that is also included. Out of the box my thoughts were that it is small, almost too small. This next set of pictures show the dimensions. Sorry, they are a little grainy but I was in a hurry. The one I missed is of the thickness of the over flow box itself. It measures 2.5" Eshopps rates this over flow up to 200 GPH. I don't know what the head loss on my Odyssea 500 gph pump is. The return is 2' 8" almost straight above the pump and the throttle is wide open. Excuse the salt creep LOL. The Eshopps PF Nano Over Flow is handling the flow flawlessly and above all else..quietly. Thank you Louie! Thank you Eshopps for another reliable, quality product at a price we all can afford!