SeaporaNano Overflow Box,Black

This overflow box with surface skimmer and siphon tube does a great job pulling surface water from the aquarium to your sump. It moves a lot of water from the aquarium to your sump style filter. Also included is a foam strainer and a bulkhead fitting. Please note that the male thread on the bulkhead fitting that extends beyond and below the overflow box is not npt. Fortunately I was able to find a slip pvc bushing with inner threads so I could connect a barb and flexible hose from the bottom of the overflow box to my lower sump.

High quality materials used in the construction of this overflow. For me, I would have given 5 stars but I did need to replace the nylon wing nut and bolt that holds the overflow on. I was not able to tighten it enough that I felt comfortable the overflow would not move or fall off. $2.50 at the hardware store gets you a better nylon bolt and wing nut that will tighten without stripping the threads. I would have also liked to have seen two nylon nuts and bolts to hold on the overflow instead of one. With only one, it has the potential to get knocked when doing maintenance or taking lids on or off and the overflow can go crooked and mess up the adjustment. Replacing the nylon nut and bolt as mentioned about will help with this. I would also recommend to the manufacturer to offer some recommended options for how to connect the bulk head in the drain box to plumb to the sump. Overall, I would purchase again. I purchased 2 and they have been running perfectly and have not lost siphon once. Beyond the nylon bolt, I am confident they will last a lifetime.

The media could not be loaded. Going strong for 2 years and the only time it failed me was when my Dojo Loach decided to go for a ride. I added a stiff airline tubing found in my LFS, and shaped it so it will prime the hose. As for the dojo, she's still alive. In fact, every fish that when through this thing survived to tell the tale. Some multiple times. Get yourself some knitting mesh and zip ties and create a gate inside the overflow to prevent this. Other than that, I love this thing. As for the pipe fittings, 3/4" pvc won't fit snugly, but after applying the priming compound and the glue it's water tight.

Spend a lil extra and go with eshopps or CPR. The nylon bolt to hold the skimmer in place did not hold up for a complete turn to tighten. The screw to level the box gave in to the the weight of the tiny bit of warer that trickles at best thru the u-tube. I just tvrew it away as it isnt worth the effort to return. It is garbage. You would get greater satisfaction pissing into the wind during a hurricane.We are forced to give it one star in order to post a review. I selected on star in protest.

I have a 240GPH pump from sump flowing into my 32.5 Gallon Saltwater reef tank. I installed a gate valve on the pump not sure how fast the overflow box would work without bringing the water level too high in the tank until I knew where my water levels needed to be in my sump. I now have lines on my sump for water levels Max and Minimum. My gate valve is now fully open moving 240GPH. Just use an airline to remove air from overflow U tube. I have not lost any siphon.

Decent little overflow. It needs at least 200 gallons per hour to overcome bubbles collecting in the u shaped overflow tube. Once I did that it has been flawless. A little noisy but hardly noticeable unless you right next to it. I’m using it on s 15 gallon micro reef. Performs as stated.

Works great in my 35gal aio acro tank

Works great on my 55 gallon planted tank. Looks clean with FlowTamer 42" spray bar. Has no problem keeping up with the 400 gph return pump. Easy to plumb with 3/4" pvc.