Aquatic Life TDS Tester Pen Calcium & Alkalinity Relay-switched AC outlets: AC outlets

Relay-switched AC outlets: AC outlets are relay switched and designed for common aquarium equipment control tasks

The medium trap gives larger or more cautious fish extra entry space

Helps align multiple ReefLED fixtures in one finished overhead system

Sensor diameter: 0

Measure sample volume carefully

Aquatic Life TDS Tester Pen Calcium & Alkalinity Relay-switched AC outlets: AC outletsAquatic Life TDS Tester Pen Aquatic Life TDS Tester Pen is a handheld total dissolved solids meter for quickly checking source water, RO water, RO DI output, aquarium preparation water, and other water quality applications. Aquatic Life TDS Tester Pen for RO DI and Aquarium Water Checks This compact TDS meter helps aquarists monitor how much dissolved material remains in water before and after filtration. It is especially useful for checking tap