Yep, green stuff and I don't mean blooming tomatoes. I noticed recently that several of the containers I am growing tomatoes in anywhere from plastic cups, to milk jugs and even some of my bigger pots are growing what looks like a green fungus or something. Now, I actually think I know why this happened. About 2 weeks ago I watered several of my tomato plants with old compost tea. This was before I knew that if you don't keep oxygen going in the compost tea it will begin to stink and go bad. Since this only happened after I watered them with the bad tea, my guess is that is what caused it. The good news is they are all still growing and doing well. There are no signs of disease on the actual plants as far as I know. In fact many of them are a lot greener than they were before. However, I do not like seeing this much green fungus stuff growing in my containers and I want to do something about it.
The only thing I can come up with is to pour 3% hydrogen peroxide into the containers for a few seconds, wait about a minute and then pour clean water into the containers to dilute and flush out the hydrogen peroxide. The thing is, I don't know if this will harm my tomato plants and I want to be very cautious because many of them are mature and have several tomatoes on them already. Will this work or is there another way to do it? Home remedies?