ZooBest Test kit for exakt measuring the total hardness in fresh- & saltwater or garden pond. Sufficient for more than 40 single tests. The test is very easy to handle and secure.https://www.aquaristikshop.com/aquaristic/ZooBest-GH-Test/187625/
- SPIRIDON K. wrote about ZooBest GH-Test in 2017:
No complaint. It is accurate and gives the same indications with sera and tetra. I recommend it unreservedly and I will buy it again.