TDS Monitor Options:Double Inline 100% recyclable polypropylene

100% recyclable polypropylene

or you are connected to city water we offer a variety of RO/DI systems that will fit your aquarium's needs

The Battery Backup is reef tank insurance in an aluminum housing

once the wrasses are under the sand

For large adjustments

TDS Monitor Options:Double Inline 100% recyclable polypropyleneThe SM 1 Single Inline TDS Meter from HM Digital measures the TDS of a single water line. This is a great tool to monitor the TDS of your reverse osmosis system. Common monitoring locations include pre system, post membrane or post DI stage. This unit features a digital display and comes with a 1 4" GA Murdock Quick Connect Tee with double o rings to ensure a proper seal. As with all HM Digital products, the SM 1 comes factory calibrated.