Readable range 0 to 1.5 mg/L.

This test kit comprises of 2x50 foil sealed tablets, crusher rod, square test tube with cap, plastic acetate colour match chart with colour breaks at 0/0.15/0.25/0.5/0.75/1.0 and 1.5 mg/L.

Full instructions are included, along with water quality guidelines.

This test kit consists of a 50ml test vial and a 250ml tablet bottle. The colour and result is determined by placing tablets in the test vial.

Full instructions are included, along with water quality guidelines.

Tablets suppled will be enough for 50 tests.

Readable range 0 to 75 mg/L.

This test kit comprises of 2x50 foil sealed tablets, crusher rod, square test tube with cap, plastic acetate colour match chart with colour breaks at 0,10,25,50 and 75 mg/L.

Full instructions are included, along with water quality guidelines

Readable range 0 to 4.0 mg/L.

This test kit comprises of 50 foil sealed tablets, crusher rod, square test tube with cap, plastic acetate colour match chart with colour breaks at 0/0.1/0.25/0.5/1.0/2.0 and 4mg/L.

Full instructions are included, along with water quality guidelines.

Readable range: 6.8 to 8.4 on the Phenol red scale.

This test kit comprises of 50 foil sealed tablets, a square test tube with cap, a plastic acetate colour match chart with breaks at 6.8/7.0/7.2/7.5/7.8/8.0/8.4.

Full instructions are included, along with water quality guidelines. This kit is supplied in a rigid plastic box.

The foil-wrapped test tablets are also available separately.