3-in-1 to 7-in-1 Digital Water Quality Monitor for Aquariums

Keep changing water conditions visible before they become a problem. This aquarium water tester provides continuous readings through immersed probes and a backlit display. Depending on the version, it can monitor pH, temperature, TDS, EC, ORP, salinity, and specific gravity. Multiple configurations let freshwater and saltwater keepers choose the measurements they need.

Key Features

• Available in 3-, 4-, 5-, and 7-parameter versions
• Backlit screen shows multiple readings
• Replaceable probes support ongoing monitoring
• Temperature compensation aids conductivity readings
• Suitable for tanks, ponds, and reservoirs

Why Choose Our Multi-Parameter Monitor

Unlike separate handheld pens, this multi-parameter water tester keeps essential readings on one display. The 7-in-1 option adds saltwater and oxidation monitoring, while lower-parameter versions offer a simpler setup.

Perfect For

Ideal for freshwater tanks, marine and reef aquariums, fish ponds, aquaculture, hydroponics, nutrient reservoirs, laboratories, and water treatment.

How to Use

Confirm the measurements included with your chosen variant. Calibrate each applicable probe using the correct solution, immerse only the sensing portion, and let readings stabilize. Store pH and ORP electrodes as directed; do not let them dry out or submerge electrical connectors.

See More in Every Water Check

Choose this pH EC TDS meter for convenient monitoring and informed water-care decisions.