Eshopps AEO11015 Overflow Boxes Pf-1200 for Aquarium Tanks

Works Awesome for my 75 gallon tank. I previously bought cheapest one didn’t realize I needed more GPH it’s a learning experience.

Can’t go wrong with esshops.

I purchased this overflow for my 75-gallon reef tank. I modified it to implement a Herbie system by replacing one of the standpipes with a longer one to act as my emergency overflow and I installed a gate valve on the output of the other standpipe to restrict the flow enough to create a siphon in the main drain. The provides completely quiet operation. The standpipe modification was easy since the opening accepts a 1" PVC pipe exactly. Also, I am using just one of the siphon tubes since my flow rate is approximately 450 GPH. The problem I ran into with this product was very unexpected. When using the supplied nylon bolts to attach the plastic weir box to the acrylic overflow box, the holes in the weir box did not line up with the slots in the acrylic weir box! I had to drill a hole 1/8" over from the existing 1/4" hole. I am surprised I have not seen other posts complaining about this since it does not seem like this would be a one-off problem. Another comment I want to make is that when installing the flanges, the rubber washers must be in the inside flange side, not the outside nut side. I saw posts of complaints of leaks here. If the washer is place on the outside, water seeps between the flange and box and then flows down the threads, sneaking inside the rubber washer and dripping out the nut. I am not implying this was the reason for leaks in all the other posts, just something to watch out for when assembling. One picture shows the hole mismatch requiring me to drill a hole that lines up with the slot. The other picture is the modified standpipe for the Herbie modification.

but. Want to drill my 125 gallon tank so figured I'd give this a try. Water flows perfectly. Only complaint is the water rushing noise but am going to try to quiet that down. Have tried several power on off cycles to test siphon and it keeps it very well.

So far I have ordered 2 and each one arrived damaged. I’ll try to order a third time and hope that third time is the charm? 😑

I have had this overflow for about 8 month. First, let me say that the overflow design is fine. It functions very well. With two standpipes, I set mine up as a 'herbie' style overflow for virtually silent operation by ditching the provided internal pipes and mufflers, and just cutting two separate lengths of PVC to replace them. One of the PVC pipes is about 2.5 inches tall for the primary pipe and the second is about 4 inches for the back-up pipe. I won't go into all the details of the rest of the plumbing for the herbie set-up, as it is well documented elsewhere, and easily found with a web search. But the main point is that you can do it with this overflow because it has two bulkheads. I knocked it down to three stars because the overall construction is sub-par. The internal part of the overflow is not acrylic. It is a flimsy plastic material. The nylon screws that hold the two parts together are easily stripped and do not hold the parts together as nicely as I would like. But the real issue with the overflow, which is true of many others as well, is that the bulkheads can leak. I was very careful when I assembled the unit and all of the plumbing. I made sure the bulkheads where properly installed and tightened. It worked great for 8 months then I noticed that it had developed a leak. It is entirely possible that the leak was caused my me, if I jostled the standpipes while adjusting other equipment behind the tank. Even the slightest gap between the gasket and the box can let water through, and though a slow (a few drips per hour) leak will not cause any major issue to a tank, it can still ruin a floor and make a mess. I fixed it be dismantling the whole system and reassembling with new gaskets and a healthy amount of silicone over all the seems on the outside for good measure. Now if you decided to use flexible hose instead of PVC for the plumbing you are much less likely to have issues with leaking, but you are also more likely to have noise issues. I don't know that there is any other overflow on the market which would be better, so if I had to, I would probably buy this product again. But having a drilled tank is still a much better way to go.

Works great. Easily pushing about 1000 gal an hour with DC pump. The key to no bubble build up is to push a lot of water through the tubes or use less tubes! It's a tuning process. Check out YouTube for more info.

I received what I believe is a used unit there was scratches on it and the bulk heads already had some usage the back piece where the screws were supposed to line up didn’t line up with the acrylic unit as well was sent without the foam too. For an expensive unit everything is wrong.

Très robuste De très bonne qualité

Arrived in good condition, needs a mod done to remove bubble collection at top of bend like the Tunze u tube

Very good!