ph probe problems

[iiluisii]

Ok when I first got the RA plus the ph probe came defective and they send me another one well after 6 month the probe its done I try recalibrating it and it just read 1.00 constant and while recalibrating it it acts weird numbers on the 7 solution go down to double digit numbers and bounce all around. Is there another higher quality ph probe that I can use with the reef angel.

[rimai]

Any pH probe can be used with RA, even the most expensive lab grade Hanna probes....
There is one group of scientists using RA for their acidification of the ocean study. They use a probe that costs around $300.