![]() ![]() So when your return pump continues to put back water in your tank, eventually it will overflow. Its main disadvantage is that in some rare cases, air can enter the siphon so the water stops draining to the tank. This doesn’t need a drill because they use a siphon to suck the water over the side of the tank. You can hang it at the back, and it’s not that obvious because you hide it with your corals and other tank décor. This is usually a HOB (hang on back) unit. The exte rnal version may also be better if you don’t have enough space under your reef tank. It’s simply too bothersome to have to drill the hole in your aquarium yourself. So if your aquarium doesn’t have predrilled holes then the external version may be a better choice. But for these to work, the main tank needs a drilled hole. ![]() You also put this under the tank and you can cover it with a cabinet. You can customize it more easily, and it’s even more affordable than the external version. Most of the time, the internal version is the better choice. For a rimmed tank, you will need to place the template INSIDE the tank and drill where the water line marker is ABOVE the plastic rim.Overflow boxes can be internal and e x ternal. ![]() One word of caution with the Fiji is that the template is made for a rimless tank. ![]() This overflow box is another high quality product and worth a look if you want a slim overflow box. Not only is the Fiji Cube overflow box have a superior design to the Eclipse, but it is also cheaper! Designed and made in Minnesota, Fiji Cube has been known for developing high quality tanks and sumps. They are also offered in more sizes than the Eclipses with the smaller models being a Durso design, while the larger models offering a true bean animal design. The design has the overflow box lower so the water level in the overflow box can be adjusted to be super quiet. The Fiji Cube Overflow Box is the ideal design for an overflow box. In a hurry? I recommend the CPR Overflow Box as a hang on option! Below would be my recommendations for a hang-on overflow box: While my recommendation would be to purchase an external overflow or consider a reef ready tank, there are many people reading this post who may not have this option. The 3 Best Hang-On Overflow Box (2023 Reviews) The main downfalls with an external overflow is that you cannot have a flush aquarium to the wall since the box will stick out, and you will have to drill your tank (or pay someone to drill your tank – more on that later in this post). You can easily find external overflow boxes with a bean animal setup and there are several models now that offer a slim overflow design, which leaves a very small footprint inside the aquarium. It is possible to get a custom aquarium with a bean animal internal built-in overflow, but you will typically pay a lot more then going with an internal hang-on overflow or drilling your tank and getting an external overflow box.Īn external overflow box offer the most feature rich option on the market currently. They are integrated with the tank and usually are built with a Durso style system, which can operate with only one hole but do not have the silent features of a Bean Animal Overflow. Internal built-in overflow boxes are what you will usually see with Reef Ready Systems like a Red Sea Reefer. The failure points of a hang-on overflow can be mitigated by building a larger sump. They are usually the most affordable of the three and can be a good choice for those who do not want to drill their tank. The failure usually will occur with the loss siphon due to failure of the tubes, pump, or a power outage. Internal hang-on overflow boxes are the simplest to install, but have the greatest risk of failure in your aquarium. There are generally three types of overflow boxes: I hope at the end of the article you will become more informed and less scared about installing an overflow to create a primer aquarium equipment system. There are many overflow boxes out in the market, so what is the best overflow box? In today’s post I will go over the types of overflow boxes, hang-on versus drilled overflow boxes, the best hang on overflow box and drilled overflow boxes, and how to install an overflow on your aquarium. It filters out surface scum off the top of your aquarium and a properly installed overflow is a clean addition to your aquarium. An overflow box is an entry point to setting up a sump. Chloroquine Phosphate Aquarium Dosing Calculatorįor anyone who has a reef tank or freshwater tank where one is considering a cleaner setup, an overflow box is a major consideration. ![]()
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