How Do I Use...

[Big_eyes]

a Jbl permanent ph tester? eg.My link

I've been given one but with a lack of instructions and as simple as it may be I can't figure it

Anyone able to offer some help?

 

[Bobtastic]

Is it the one on the JBL site?

If you click on the UK flag (Union Flag, not Jack only a Jack when on a boat/ship> click on Aquarium > Accessories > Water Analysis > Test-Set CO2/pH-Permanent