Hello LRT,
for PH we like the Neptune Triton but I have found that you need to calibrate it every 3 or so months. The best way to test if the PH probe is accurate is to put it in 7 solution and then see what the probe is reading .. If you put it in and it reads 7 straight away then you know its accurate.. then try this with a 10 solution. Do you have the neptune PH probe?
the problem IMO now with hanna checker is that not many people have it yet so I think we cannot all test it.. once it becomes more available I hope everybody else will share the result here.. Since Now i am not sure which test kit to trust we are flying blind at the moment. The corals seem to like it that i am backing down from 55 no3 but i had some other corals start to RTN and i think its because we stopped dosing the neonitro. Some Corals look amazing with PE and others like a little more dry. Neo Nitro also has Potassium so now that We are not dosing the Neo maybe the Potassium level is lower.. so much to consider LOL
IMO PH at 8.3-8.5 is not bad that is closer to our range with a high of 8.5 see graph below. when we leave the windows open it reaches 8.5.. but once the weather outside is at 75 and above we have to shut all the windows for the AC and the PH max then is 8.3...