Coralife Digital pH Tester - $30.00 includes shipping

[joedarat]

I've used it about 10 times.. it works fine, but may need to be calibrated again.

comes with calibrating screw driver

product info:
he Coralife Digital pH Pen Tester is a fast, easy and accurate way to test the pH of your aquarium. It features a large pH-sensing electrode and an easy to read LCD screen. It has a wide pH sensing range from 0.00 to 14.00 and a long battery life of 3000 continuous hours of use. Features + 0.2 pH accuracy.

 

[RLG2182]

I would be interested! How do you calibrate?

 

[joedarat]

they sell calibration kits for it... i did it with out the kit , using proper ph etc.

just took some pics:

 

[joedarat]

calibration solutions:

http://www.thatpetplace.com/Product...Kits/T1/F73+0047+0525/EDP/13501/Itemdy00.aspx

basically you get some sample water to 7.0 and adjust the device to read 7.0 and stay there.. thats it