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Who makes a more reliable ph pen, blue lab or hanna? Reliable meaning both accurate and long lasting diodes, thanks everybody!

I am very interested to hear what people suggest for this. I bought one of the cheaper hanna ones and it works okay except I have to calibrate it non stop like every 2-3 days or I am .3 off. It was 25 bucks though so I guess i should not be to disappointed.

I was just about to ask everyone the same! but im doing good my friend, hows your evening going brother?
When i switched to coco i bought a Blue Lab ph pen/meter..best 85$ i ever spent.i do check/calibrate it once per month and use the storage solution,but it is a good investment
 
Thats Awesome i wish i had the building skills to build one, id try to build one rather spend over a grand on my next LED's! because i have heard if you make them right you can save a lot of money and have some power full shit?
I had not wired anything since high school which was some time ago. Check out the DIY thread if I can get one together anyone can.
 
When i switched to coco i bought a Blue Lab ph pen/meter..best 85$ i ever spent.i do check/calibrate it once per month and use the storage solution,but it is a good investment
It really stays accurate for a month? What model number do you have?
 
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