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The overflow box effectively transports aquarium water to under cabinet sumps, refugiums, or wet/dry filters. These high quality overflow boxes features bulkhead fittings for secure and convenient installation. The U-tube style compact overflow boxes are designed to fit between your tank and your wall to maximize space usage in your aquarium setup. With only 3 in. required between your tank and your wall, these boxes are excellent for optimizing space. Each box includes everything required to attach it to your system.
1x Prefilter Box
1x External Filter Box
1x Foam Cylinder
Screw(s) and Wind Nut(s)
Starting the Siphon:
can be done with a 1-foot piece of airline tubing. Start by filling the aquarium until water flows into the intake box, and then using a cup fill the external box with water until the U-tube end is covered. Remove the U-tube and place one end of the airline tubing into the U-tube. 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 out of the tube until it is replaced with water. You may be required to fill either the internal or external box with more water as the siphon is created. Once all the air is removed the airline tubing must be removed or submerged.
Once the siphon is created it is important to keep air bubbles from forming in the U-tube. If you find bubbles forming, it could be a variety of things from too little flow to microbubble build up.
Up to 6000 LPH Flow Rate
Synergy Reef Systems Shadow Overflow is one of the most sought after overflows on the market today. Here at BRS almost any tank we set up will incorporate the Synergy Reef Overflows for their extensive f…