This is well water, it is not treated with chlorine/chloramine/etc.
There are a few rocks in the 29 gal tank, but they are not limestone. There is also a large piece of manzanita driftwood. There are no rocks at all in the 10 gal tank. Both have the same pH.
Yes, I did measure the pH in fresh well water. I will try again after letting it sit awhile and see what happens. That may be the answer.
Yes, I also measured the pH at the end of the day. The lights were off, but had recently turned off. I will try again in the morning and see if things change.
I re-tested the ammonia on RO water, well water, and both tanks. I did the tanks first, and thought it again was 0.25 ppm. To my eye, it seems to have a faint hint of green. But when I tested the well and RO water, they were very obviously the same as the tank water. So I think it is the lighting, or my eyes, but probably all are 0 for ammonia. I simply can't imagine there being ammonia in the RO water (I think it is pretty unlikely for the well water, too). I just see that color as being a little bit greenish, but it must be yellow.
Last edited by Darkblade48; 05-23-2019 at 12:25 AM.
Reason: Please use the edit function for back to back posts to keep threads cleaner