Temperature And PH

I can't answer that with any authority H, but it would be hard to imagine a 0.5 degree difference having any bearing... 

I actually had the concept of ions at the back of my head, when I initially wondered about temperature.

But my half a degree is definitely not correlating to my pH. My pH is higher than expected. According to that snippet (which makes sense to me) my pH should be lower.

I have to say, that although I love the detail that the Seneye gives me, having it has significantly increased my stress levels! I see patterns and variations that I never saw when I was reliant on my analogue stick thermometer and liquid tests.

My Seneye was a gift. But I don't think they are cheap. I keep looking at the webserver and WiFi unit so that I can have it permanently hooked up to the web. (I can check my tank from work or my bed!). But I am struggling to justify the +£150 price tag for what is, essentially, a nice to have. At the moment, I upload the offline readings every so often (every 1-2 weeks, unless there's something going on). There are lights on it that tell me if the readings are outside the parameters I've set, without having to connect it to my laptop.

Really, the only readings I use are the temperature and the pH. The ammonia has too little visible variation (as you'd expect for a mature planted tank) and the other chemical readings are calculated, rather than measured. Except for the light. As I have LEDs, the colour temperature readings don't work and my lights are on timers, so the total lumens doesn't really tell me anything I don't already know. And I don't consider it a disaster if my lights don't come on. The thing that is interesting is how low my light levels actually are. But my plants are ok with that, so I don't worry.

Temperature does affect pH but not significantly enough for us to detect in tanks. By the time we could measure a difference in pH the temperature change would have killed the fish. We work in a very narrow temperature band.

These figures are for pure water, though our tanks are not pure water:

20^oC - pH 7.08
25^oC - pH 7.00
30^oC - pH 6.92

In chemistry, every parameter is quoted at STP - standard temperature and pressure. Pressure is 760 mm mercury and temp is 25^oC or 298^o absolute. This is why the pH of pure water is always quoted as 7.0 - that's the value at 25 C.

Using just test kits, liquid or strip, the variation is too small to detect. i have no idea if Seneye is sensitive enough to detect this small a variation.

I’ve just had a horrible thought. The Seneye is quite close to the water surface and angled towards it. I’m wondering if bright sunlight has been affecting the sensors. I have moved it lower in the pond in order to rule this out.

Yes it’s permanently connected via a Seneye Web Server.  It was originally in my planted tank but I relocated it to the Pond as it’s more susceptible to problems.

Yes Helen, I am using the WiFi unit. It’s a standard adaptor (Edimax N300 range extender) with a single network port.
The SWS was originally connected to a spare network port on my router until I relocated it to the Pond.
I would say the SWS would be better hardwired directly to the router if that’s feasible.
I have the occasional dropout using the adaptor, but it’s a fair distance from the router (about 50 feet).