PHx2 test: 4.5–9.0 and 6.0–8.0

This liquid pH test kit is aimed at aquarists who need to check water chemistry in freshwater tanks and want a reading they can rely on before adjusting their setup. It addresses the basic question of whether the water parameters suit the fish, plants or other livestock being kept.

Why it matters

• Two measuring ranges: the kit covers pH 4.5–9.0 for a broad overview and 6.0–8.0 for finer readings within the most common aquarium range.
• CO2 calculation: the supplier notes that knowing pH together with KH (carbonate hardness) allows the CO2 content of the water to be calculated, which is essential when fertilising with carbon dioxide.
• Complete set: the kit includes a test tube, reagents, a syringe for accurate sample volume, a colour scale for comparing results, and instructions.
• Colour-based reading: results are read by matching the sample colour against the included scale.

Specifications

• Test type: pH
• Measuring ranges: 4.5–9.0 and 6.0–8.0
• Brand: Zoolek
• Symbol: Test Zoolek pH x 2
• EAN: 5907527410204
• Weight: 0.1 kg
• Contents: test tube, reagents, syringe, colour scale, instructions

What it works with

The test is designed for freshwater aquarium water and fits planted tanks where CO2 fertilisation is used, as the pH reading is needed alongside KH to estimate dissolved CO2. It is a general water-testing tool for home aquaria and can be used alongside other water-parameter tests in the Zoolek range.