Help! Diagnosis assistance please.

[ikegass33]

After doing some research, I believe what at least 5 of my tomato plants have is Septoria. I've remove the affected leaves, but now I'm looking for a confirmed diagnosis from more experienced gardeners. I'm growing these in 5 gallon buckets as well (if that matters). This is my first year at this, and I'm doing it for my mom, who is actually really enjoying the experience.

So if you can help with the following:
1. Diagnosis
2. Recommended treatment

Last night I bought some Daconil spray(not concentrate, think I made a mistake?), and I have some copper fungicide, and I'd love to have any input on what the best chemical treatment would be. I may even considering watering them down with a bleach /water mix as I saw in a Septoria thread. I also read some say Daconil doesn't work but the copper sprays do, vice versa and all sorts of conflicting opinions so I'm confused there. Thanks for any assistance you all can provide!!

Pat