@Nativeplanter. I am using API Stresszyme which is used for chlorine and chloramine.
I am to date getting NO nitrite or nitrate readings. Ammonia was dark green. I did a water change of about 80% of the water last night. Got it down to near zero. Didn't want to get it that low but anyway, that shows it is not a reading that is due to the water change.
I had a lot of API Ammo-lock in there initially. I am hoping that lead to a false ammonia reading. I still haven't lost any fish and the few stressed looking ones seem to be recovering.
It is like the nitrogen cycle is paused. I will give it time and see where it goes.
I have added established gravel, used bottled bacteria cultures (some swear by them some call them snake juice), would say I have a heavy plant load in comparison to my fish load.
Googling - Aquarium won't cycle - and seeing what I find.
OK, this explains a lot. Ammo-lock (and other similar products) will put the ammonia into a non-toxic form, but your test kit will still react with it. So if you put in a real lot, it is quite plausable that you did indeed put the cycle on "pause", and ammonia generated by your fish was immobilized. So, as schambers said, it can screw up your cycle. As a result, your ammonia test kit is useless. Since you've changed a lot of the water, things should start moving along, and you will start to see nitrite/nitrates. But I wouldn't worry about the ammonia readings for now.