Recent content by ChrisA76

Recently my spa wall fittings on my near 20 year old pool started falling apart. Two broke off when I was having some work done. They look like this and don't seem to have threads on them. This is what the socket looks like after the inserts have come out. They seem to be 1.5 inches in...

Cool idea! (plus those are my fingers)

That’s right. Calibration and inter test variability are the big ones for me. I bought one photometer based solution and it was worse than miscalibrated it was producing wildly different results with the same water sample. I have come to trust my Taylor kit and I know a few others do here too...

It’s a good idea. If you did this you’d want to use the V part of HSV and not the H (hue). And ideally you’d want to average over a window of pixels because while hue angle tends to be similar over nearby pixel, the intensities (values) can vary a lot from pixel to pixel. Would be good to find...

Yeah this is the main thing you have to get right when you take the picture. Using the white card is ideal but as long as the background is pretty consistent, it tends to work well.

Yes I’m so painting my house “dark Terra cotta” now, aka “pH 7.6”

To say a little bit more. If you click on the color name on the “What a color?” App it shows you this. Note the hue in degrees.

Ok I used the App (for iPhone) called “What a Color?” ‎What a color?

Thanks for pointing this out. I PMed Matthew from that thread about this one. I personally tried the ColorQ Pro 7 2x and found it pretty unreliable in general. The same exact vials were producing different measurements over different trials with the same lighting and everything. It's possible...

Good point. The main reason I did the acid demand test was because I was reading higher than 8.0 pH. Is there a better way to do this?

@generessler I just now saw your thread on this from August. Hope this keeps you from having to develop it yourself. PM if you want the actual App that I used, I don't want to be seen as promoting any apps.