I'm sorry, I meant high in iron before the filter.
The plants look like they are all stems because that's the kale and I cut it two to 3 times a week and have been since mid May. I cut about 16 cups a week of it. Honestly the kale is doing fairly well. It's the Romaine that started with curling tips and brown rot at the ends
The tanks you see now are a second adaptation. The first was a board with a long shallow tank under it. The rock wool got really wet there and stayed wet which is partly why I moved to these tanks. Yes the water is 1/4-1/2 inch under the baskets.
I'll locate a thermometer next shopping trip to Wally World.
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