TRANS INSTRUMENT Arowana Pro pH Temperature pen

pH and temperature are the most basic test parameters for Arowana aquaria. A healthy Arowana requires a water condition that is near to its native environment to thrive. Under the right water conditions, the fish will be more healthy and resistant to sickness and therefore be able to glow in full color.
Advanced features:

Dual Functions
Able to display pH and temperature after a stabilized reading is established.

One-Touch Calibration
Calibration is most critical in all pH meters. The wrong calibration results in inaccuracies and could endanger your water management. This meter effortlessly calibrates with a single press of a button. No more damaged trimmer with screwdrivers. Always calibrates accurately!

Automatic Endpoint Reading & Calibration
Eliminates guesswork! This meter automatically locks to an endpoint reading on each test and calibration.

Beep Function
Audible beep with every press of a button and a long beep on every completed function and end-point reading.

TRANS INSTRUMENT Arowana Pro pH and Temperature Pen

The Arowana Pro pen reads both pH and temperature, the two parameters that matter most for keeping an arowana in good colour and health. Arowana do best when their water sits close to their native soft, slightly acidic profile, and Singapore’s treated tap water tends to start soft, so knowing your exact pH lets you confirm conditions rather than guess. The dual display gives a stabilised reading once the value settles.

We recommend pen meters over colour test strips for serious keepers because the digital reading is far easier to act on, especially in larger arowana tanks where small drifts matter. Calibrate it regularly with the correct solutions to keep readings trustworthy, and store the electrode properly between uses so it does not dry out. Used alongside steady temperatures in our warm climate, it helps you maintain the stable water that keeps an arowana resilient.

See our full water testing and care range, and read our Singapore arowana care guide and digital pH pen guide for context.