Up-pot into a gallon container. this will allow the roots to grow outward and let the plant grow bigger. "Bigger roots, bigger fruits!"
Good idea with the fan. Keep that going to keep air circulation and the breeze around your plants. Just remember, you don't want the fan blowing directly on your plants. Have the air from the fan hitting a wall, or a corner, before it hits your plants. Too much of a breeze can cause windburn.
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I hope this helps!