Everything looks great. I love the pond it looks perfect. I hope you are happy and your back isn't hurting anymore. I want your cat, looks like a happy fellow.
So by comparing a leaf of mine to the ones on that website mentioned above I think it it Early Blight.
"Early Blight
Alternaria solani
Symptoms:
Leaf symptoms of early blight are large irregular patches of black, necrotic tissue surrounded by larger yellow areas. The leaf spots have a...
I found this awesome website regarding tomato problems. It has great pictures to help identify the problem.
http://aggie-horticulture.tamu.edu/publications/tomatoproblemsolver/
I ran across it because sadly something is wrong with my plants.
Check out my blog tomorrow for more details of the...