The Bean design uses the same valve-controlled siphon drain as the Herbie setup. 99 ($93.99/Count) "eclipse overflow box" Eclipse S Overflow Box Small - Eshopps. I was going to get this HOB overflow for my reef tank, but opted out for a Aqualink ADP 2110 long, which is rated at 550 GPH. Adjust the tilt of the overflow (if possible) so that it is level with the tank water. This box measures 8 by 3 by 10 inches, which means you only need 3 inches of space between the wall and the tank (better make that 3.5 inches to be sure). Replace the U-tube into the overflow making sure that the airline tubing is at the apex of the bend and using a pump like a Tom's Aqualifter to suck the air … The HOB itself is really good, the siphon does not break and the quality of the build is fantastic. Remove the U-tube and place one end of the airline tubing into the U-tube. This refugium is designed for those short on space. Serving a host of purposes, you can use it for breeding fish or growing algae. From $499.99 Fiji Cube 48 Gallon Shallow External Overflow Rimless Nano Tank. A 3 drain overflow is often referred to as a Bean Overflow. It is widely considered the best overflow method. Regardless of your purpose, the refugium comes with all accessories you might need, including a nano water pump. Quality is nice and there's really not a lot to it, just a couple acrylic boxes and a U tube. The original Bean design refers to a specific implementation — a coast to coast overflow with a relatively shallow box containing the pipes. "overflow box nano" Bubblefin Aquarium Sump Refugium DIY Kit for Protein Skimmer Sump - Chamber dividers (20 Gallon Long) ... $30.99 $ 30. Fiji Cube 32 Gallon External Overflow Rimless Nano Tank. Reef tank plumbing is a necessity unless you purchase an all-in-one aquarium. 99 "hob overflow box" Eshopps PF300 Overflow Box for Aquariums, up to 75-Gallons. Perfect for small reef or fish aquariums and BioCubes, any nano tank. It was cheaper than the PF-300, and it came with more items such as the tubing. Before starting the overflow, fill the sump to the operating level. The customer service is great also. One of its main benefits is the lower flow, which gives fish a stable breeding or growing environment. Regular price $749.99 Fiji Cube 32 Gallon EXT Rimless Nano Tank Package. With an Herbie setup, It is able to handle a Eheim Compact+ 5000 at 1300gph with overflow to spare. I did order a couple extra U tubes for redundancy. It is a good idea to have extra water prepared just in case you need more. In particular, we’re talking about the PF-800 overflow box, which Eshopps recommends for 75 to 125-gallon aquariums. Just grab a cup and fill them. $93.99 $ 93. PF-Nano HOB Overflow …the U-tube and place one end of the airline tubing into the U-tube. 4.4 out of 5 stars 109. We’ll cover designs, plumbing diagrams, parts, the overflow (Durso, Herbie, & Bean Animal), the return line and return pumps. 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