![]() This does work well, but it is expensive and has it's own set of problems. Some people that have a lot of power outages have installed backup generators. A return pump uses a lot more power than a circulation pump. They can keep circulation pumps going for awhile, but if you try to use them to keep a main pump going, you will typically tend to drain them very quickly. It only takes a few tube worms growing on the check valve to make it fail.īattery backups are of some, but limited value in SW systems. Water can flow through the 1/4' teeth in the wet-side of the overflow, and then through the included bulkhead into the external box that holds additional bulkheads to let the water. This is because SW tanks get a lot of growth everywhere in the system. The internal/external design for the Eshopps Eclipse Overflow Boxes creates a minimalistic design inside the aquarium, extending less than 1.25' inside the aquarium. Otherwise the check valve will not seal properly if the flow stops. If you do that, you do need to clean and test it regularly. Alternatively you can also use a check valve. Then if flow stops, air will enter the hold and break and the siphon. The best solution here is to drill a small hole in the return pipe just above the water line in the tank. The main problem here is preventing the return plumbing from back siphoning, that is flowing in reverse, and draining the tank. However, you still need to worry about power outages. Loss of siphon due to air bubbles is unusual because the round tubes tend to pull any bubbles right through. ![]() You can see them here (offsite) - īecause of their design, the overflow boxes I mentioned do not loose their siphon during power outages. They are not as good as the Lifereef, but the design is at least acceptable. See them here (offsite) - I know, they cost about 3x the price, but the siphon tubes are removable, cleanable and replaceable.Īnother possible alternative is an Eshops overflow box. If you need to use an external overflow box, by far the best one out there is Livereef. ![]() When I replaced it, I smashed it to bits to avoid inflicting it upon some other unsuspecting hobbyist. I speak here from bitter experience, since I at one time had a CS202 on my system and had all of the above problems with it, plus some additional ones. If that happens the siphon will break and you have a flood. The small connection at the top of the siphon easily breaks off. If that happens, you are back to the previous problem. To attempt to avoid the previous problem, they recommend using a small pump such as an aqua lifter to constantly remove air bubbles via the small connection at the top of the siphon. The wide U siphon easily traps air bubbles, causing the siphon to break. This can allow it to clog and cause a flood. These make it impossible to get any kind of cleaning too up inside it for cleaning. It is impossible to clean the siphon area. I recommend avoiding this design at all costs. In my opinion, this design has so many design defects that it will easily cause floods. The overflow box you are looking at looks like a CPR overflow, see this link (offsite).
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