Keeping Mycorrhizae Alive? Do's and Dont's?

[cgs]

Doing some research here on Tomatoville... I fear I have been killing my Mycorrhizae or certainly not letting them develop to potential. Here are some issues I am aware of below. Are there more?

1. P>4 in N-P-K. I understand they don't like a phosphate number over 4. That this isn't a firm rule, but that they don't like triple superphosphate.

2. Using tap water with chlorine isn't good for them?

3. Seems Daconcil (anti-fungal) applications would be bad. Perhaps Actinovate foliar app in place of?

I would like to know if there are more dos and don'ts and even if my above concerns are valid. I am considering using Actino-Iron, Azos and BiotaMAx - is anyone aware of the same or different issues with those?