It all sounds good, and getting everyone's input is going to make it a great tool!
The only comment/criticism I can come up with, I guess, stems from my own ADD, and lack of willingness to "read through" too much information [well, it helps that I've worked with kids [Boy Scouts], too, and they are notorious for skipping the directions, so I've had to try REALLY, REALLY HARD sometimes to get my point across in as few words as possible....without LOSING my point
]
Becky, however you decide to format the final product, please keep the above in mind. Maybe putting the important "this is what we want you to do" instructions up front, then adding the "this is why, what, etc." info as an * in lower part.
If the fish owner is stressed enough to write [though there have been a couple that I wonder about their intentions...], chances are he/she just needs to know that initial stuff to start out: WATER QUALITY CAN HAVE AN EFFECT ON POND FISH: please test your water -- what are the results -- what symptoms -- duration, etc. Then, once they feel better about what's going on, they can digest the rest of it. I'm like that. I read on a need-to-know-at-this-minute basis. I'll read through something, find what I need [based on my level of experience at the time], but just skim over the rest. I'll remember that "I read something about that" later, and will go back to that article or site, when I'm READY to learn more.
I'm excited, and I can't wait to see how it goes!