What is this on my tomato leaves?

[Fiishergurl]

It is spreading like crazy. Started on one plant only we didn't know it was something serious so we just removed the leaves (1 here, 1 there) for the last few weeks. Then a rainy night and a couple of days later about 30 leaves on one plant had it and a few leaves on a couple of other plants. They are grown in homemade containers with miracle grow potting mix, 1 cup of lime and a 2 cup fertilizer strip of 10-10-10. They've been in the container since about Feb 1st (zone 9b) in central florida. Just a week ago we started supplementing with 2 tblspns of Texas Tomato Food about every third fill up since we have a 2 gallon reservoir. The plants were looking amazing (still look good at first glance) and then the leaves started getting this stuff. We sprayed yesterday (when we noticed it) with Serenade and removed all of the affected leaves we could find. The plant that has it the worst has also been dropping blossoms and some have been rotting. It does have about 5 little tomatoes on it but has probably dropped 20 buds or more over the last couple of weeks. Some just drop and some rot. I thought maybe that was because some blooms were on the plant when the weather was still below 50 at night during some nights in February and a few in March.






Here's some pictures of the plants just so you can see the overall status of them. They still look healthy until you look closely. Every time I go look at them I find more infected leaves that I didn't see before so I don't know if it's just spreading that fast or I missed them. I remove infected leaves, bag them, and immediately wash my hands and scissors before going back again. The pictures below were taken before I removed all the bad leaves and you might be able to see them in the pics.








Forgot to mention we are at an RV Park on the Intracoastal Waterway in Central Florida. The plants are grouped together in these pictures because the wind was 15-20mph with gusts up to 30 so we had them behind a partial wind break. But they are always in close proximity to each other and only 20 feet away from the salt water.

Any suggestions, advice, etc would be greatly appreciated.

Thanks!
Ginny