Although the main tank is the center of attraction, it is only part of a system of 4 tanks.

Water leaves the main tank in two ways: it overflows through the skimmer box into the sump, and it is also intermittently pumped into the propagation tray / refugium by a MicroJet pump.

From the refugium, the water overflows through a PVC pipe angle into the seahorse / algae tank, and in turn it overflows from there into the sump.

The main support hardware is kept in the sump. A Mag Drive 700 acts as the heart of the system sends the water back to the main tank and begins the cycle all over again.