Plumbing

Some areas have softer water, while others quite the opposite. Source water that measures less than 300 TDS is best; anything higher is harder on the system. Measuring the source water's TDS levels can provide some idea of the conditions you are dealing with. The higher the TDS, the harder the membrane has to work, and decreases its life. Lower TDS-laden water is always better.  Keep in mind that those numbers may vary throughout the year, affecting the way your RO system works. 

1) Turn off the water going into the RO/DI system.

A tank with a single overflow can still run to two zones of a sump.  I recommend running the drainline into both the skimmer section and the refugium zone, and I'm often asked how this is accomplished.  Using gravity and a few extra fittings, you can direct water to two different zones from a single drain pipe.

Congratulations! Your reef will thank you for providing excellent water quality from now on. This 100gpd 5-stage RO/DI is very easy to install, but if you have any further questions, you can email me any time. Contact info: Marc Levenson • Ft Worth, Texas • (817) 946-5271 • sales@melevsreef.com

Congratulations! Your reef will thank you for providing excellent water quality from now on. This 100gpd 5-stage RO/DI is very easy to install, but if you have any further questions, you can email me any time.

Ein Closed-Loop-System für ein Becken ohne Bohrungen  

English version here: http://www.melevsreef.com/tanks/29g-closed-loop-in-an-undrilled-tank