Crossposted from /r/Aerogarden as suggested by a lovely member of that subreddit!

EDIT: I've been googling for days and finally found something that looks similar/likely. I believe it's Edema (sometimes called Dropsy) apparently. So now I just have to figure out why and how to save them!

First time Aerogardener here. Got some great advice on my last post (so thank you!).

Ended up trimming a leaf from my tomato plant which was undoubtedly the wrong decision, but it looks extremely sick and has yellow spots all over it. What's the cause?

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https://preview.redd.it/rmf6s3d68f161.jpg?width=3492&format=pjpg&auto=webp&s=80e5eb4f6e2f54dd133c1308d184563c76533b63

I had been doing really well, checking and caring for them and my lettuce daily, I rinsed and refilled yesterday and now today I noticed a tiny fly (like super tiny) flitting around as well. So now I need to spray some natural pest remover as well.

Is the tomato plant saveable or should I just toss that one and start over. My biggest concern is about spreading to the others too, which seem healthy but might be starting to curl or wilt a little. I had planned to get a special additive for the tomatos this week (as suggested previously for later on the growth timeline), but other than that I've been following the Aerogarden instructions.