Anne,
Nutrient calculation is one of the biggest challenges. After a while you will learn to sum up a plant's needs easily. For dwarf tomatoes, using 10 gallon Brute trash cans connected to a 44 gallon Brute trash can reservoir would make a nice float valve setup. Less fill ups and more free summer days. I've not seen issues with heat since Kratky plants pull oxygen from moist aerated air roots. Only ambient summer air temperature outside the preferences of a plant seem to impact fruit production.
For cloning tomato plants, I prefer to cut a large sucker from a mature fruit bearing plant. The clones have the same genetic age as the mother plant. So, after growing a root system, the clones will begin the flowering and fruiting process that is around 60-70 days in my experiment.
Look me up on Facebook messenger. I will help you with your setups.
Last edited by deep_roots; April 16, 2021 at 09:25 AM.
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