What ph pen do u use ?

f1bud

Active Member
i av the ten quid crappy screwdriver callibration type PH PEN i dont av the best sight n strugle with the callibration as its a tiny screw that u have to adjust with a even smaller screwdriver, its unreliable inconsistent and i need to buy a new one asap !! 30/40 pound is a good price anymore than this and i wont b able to afford it so could u guys tell me what use have and how relible they are pls ? thanx peeps !
 
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