TDS-3 Water Tester

A practical tool for consistent water preparation

If you use RO/DI water, remineralise your own water, or simply want a quick way to monitor TDS and temperature during aquarium maintenance, this meter is a simple and useful addition to your aquascaping toolkit.

For aquascapers, TDS (Total Dissolved Solids) is one of the most practical numbers to check when preparing water — especially when using RO/DI water and remineralising salts. This pen-style meter gives you quick readings so you can repeat your water preparation routine with better consistency.

It also measures temperature, helping you check your water before water changes or when mixing fresh batches.

Why aquascapers use it

This meter is ideal for:

• checking TDS of RO/DI water

• measuring TDS after remineralising

• matching water change water to your aquarium routine

• monitoring consistency for planted tanks and species specific setups

• checking water temperature during preparation

TDS won’t replace full test kits, but it is an excellent everyday control tool for maintaining stable routines.

Key Features

• 2-in-1 measurement modes

  • TDS (ppm)

  • Temperature (°C / °F)

• Simple pen-style design

  • Quick dip-and-read testing for water prep and maintenance

• No-fuss operation

  • Easy to use for routine aquarium checks

• Compact and portable

  • Great for fish rooms, bucket mixing stations, and maintenance kits

• TDS-focused for aquarium use

  • Perfect for RO water and remineraliser workflows

Common aquarium uses

Aquascaping / planted tanks

Use TDS to keep remineralised water batches more consistent and reduce variation during water changes.

Species specific tanks

Helpful for preparing stable water and checking TDS before adding fresh water to the tank.

General fishkeeping

A quick way to monitor dissolved solids and water temperature as part of regular maintenance.

Important notes for aquarium use

• Rinse the probe with clean water after use.

• Do not immerse past the recommended line (if marked on the unit).

• For best consistency, compare readings at similar temperatures.

• Use alongside your regular aquarium test kits (such as pH, GH, KH, ammonia, nitrite and nitrate).