wasnt sure where to post this... Just stupidly dropped my pH pen into the tank. Managed to get it giving readings again after drying the insides out a bit. But seems to be giving out the wrong readings out. Dont have a clue how to calibrate the thing, no instructions were given with it.

Was a bit cheap, so you guys reckon its knackered for good or can it be calibrated? if so any simple ideas on how to calibrate, and what i will need?

cheers in advance

Thats Ph Pendeggo to you, and she is well ard ill have you know ...



Sorry not my territory, growing, ask one of the adults

if its an orange ph pen it will still work mate an to calibrate u want a bottle of buffer 7 an all u do is put some in a cup turn your ph pal on stick it in if it reads lets say 7.5get a real small screw driver an at the back of your phpal is a small hole put it there an turn very very little it will go up or down get it to bang on 7 job done throw the buffer down the drain an wash your ph pal in clean water b4 you test the ph in your tank

Dunno really but I was going to buy one of those cheap pH meters until someone told me they don't last very long - anyone have any idea how long they do last?

its not an orange one, its a beige coloured "PH-03(I)" from america i think. But it has a very small screw on the back so will try what you said.

cheers mate

ps: bod, i believe if you calibrate them when needed they will last for long enough. The crappy little test kits really are a HUGE hassle once you have used a (cheap) pH pen. Mine needs calibrating now so am using the liquid test kit, and they really are annoying trust me...

Thanks, it was the "PH-03(I)" I was actually looking at by extraordinary coincidence. I may have to get one.

Ive ad mine for about!! 10 mnths calibrated it twice "took 2 todo this wernt easy"
And its acurate enought to .1%
Id say be easyer for you to buy 1 those Draper 3 in 1 PH probe, dont need calibration. and it test temp to aswell as mostuire and light!
All for around £9.99 " Their is one just does soil not water check first!

happy growing

wisp