API High Range pH test kit

Jyetman · 07/01/2020, 05:34 PM

Which would be more precise a pinpoint PH probe calibrated on a apex system or a $10 API Test kit? The reason I ask is after several calibrations my PH Probe reads 8.14 and the API high range reads 8.40 each time. Should I rely on the pinpoint readings?

Vinny Kreyling · 07/02/2020, 08:30 AM

Probe.

outssider · 07/02/2020, 03:13 PM

8.4 seems high unless you are doing something purposefully to raise ph...there is a lot of interpretation involved with viewing the color on the api...also viewing from different types of light and angle of the light etc.

07/01/2020, 05:34 PM	#1
Jyetman Registered Member Join Date: Nov 2012 Location: Phoenix, AZ Posts: 1,712	API High Range pH test kit Which would be more precise a pinpoint PH probe calibrated on a apex system or a $10 API Test kit? The reason I ask is after several calibrations my PH Probe reads 8.14 and the API high range reads 8.40 each time. Should I rely on the pinpoint readings?

07/02/2020, 08:30 AM	#2
Vinny Kreyling Registered Member Join Date: Nov 2002 Location: Miller Place, NY Posts: 7,206	Probe. __________________ 250 gallon mixed reef, 2 Reefbreeder's Photon V 2, Deepwater BLDC 12, DAS EX-3 Skimmer, MTC mini cal, 2-3/4" Sea Swirls, Aquacontroller & 6 Tunze pumps.

07/02/2020, 03:13 PM	#3
outssider Registered Member Join Date: Nov 2009 Location: Reseda, Ca. Posts: 1,717	8.4 seems high unless you are doing something purposefully to raise ph...there is a lot of interpretation involved with viewing the color on the api...also viewing from different types of light and angle of the light etc. __________________ Please don't feed the bears because the bears will become dependent on free handouts and forget how to take care of themselves …... Current Tank Info: 75 Gal. Mixed reef mostly sps