I bought a 6in1 test from aqua shop. It has all tests but Ammonia. My GH and PH are too high.
PH- 8,2
GH- 19
I have been using "PH down" solution of API but doesn't seem to be working.
Edit: Oh , i just read an article. It says if your GH is high, you will have trouble taking down the PH.
Why are those readings "too high?"
My ph is 8.5 and my hardness is almost off the scale. It causes no issues with my fish. Trying to change Ph can, however, especially if it's done too rapidly.
The last thing you want to do with stressed fish is change the water chemistry, although a lower ph will reduce the unionized ammomia.
I never test hardness. It's a non-issue for me.
