Water test block suitable for measuring chlorine levels and pH in ponds / aquariums to check that all the chlorine has been removed.

Test block meassures chlorine levels from 0mg/l - 3mg/l

pH levels can also be measured from 6.8-8.2

As wel as the block the kit also comes with:

20 x DPD No 4 Rapid dissolve tablets

20 x DPD pH Rapid dissolve tablets.