Ammonia vs. pH

[marcusbacus]

I found this table that measures the toxicity of ammonia related to the pH, can this be safely "applied" to bettas?
www.jbl.de/uk/aqua/uk_25365tab.html

[amanichen]

I hate it when people use the phrase "toxicity of ammonia."

Really this isn't toxicitiy at all, but the free ammonia concentration given a certain total ammonia concentration and a certain pH

This thread has what you need to know, in my third reply down:

healthybetta.proboards19.com/index.cgi?board=waterconditioning&action=display&thread=1098370490

[BlahBlah]

I have a few questions about pH, ammonia and whether it can be affected by aquarium salt or medications. I know these questions are probably really basic, but I need to ask stupid questions right now or else I feel even more dumb for not learning from them

I just got a test kit (AP Freshwater Master Test Kit) and tested the tank water and tap water, but I don't know if it's "safe" or not.

I read that the pH for bettas should be around 7.0, but what is the highest pH that can tolerated without harming them? I noticed that my tap water + NovAqua conditioner has a pH of 7.6, while the tank right now has 7.2. It 7.6 too high of a pH? If so, what should I do to lower it without using pH up/down?

What is the highest ammonia reading that's dangerous for bettas? Right now my tank has about .25 ppm according to the test kit.

The tank (1 gal, uncycled/unfiltered) currently has a dose of Melafix and aquarium salt, so are they affecting the readings at all?

Thanks for your patience...