Here lately it seems that is a lot of similar threads that keep getting repeated. I have posted in several lately, they just keep commin. If folks would just take a bit of time to research and read there is so much info available.
That being said,,,,,,,,,,,
lets talk about a fan on your plants making the stems stronger?
This is yet another myth but like all the ones we have previously covered/busted there is truth in this one as well
The benefit of a fan circulating air in your indoor garden is that it prevents several diseases known as Damping Off, here is a quote from another site defining/explaining them,,,,,,,,,,,,
Now I couldn't say it any better than that and there is yet another benefit of the top layer of soil being dried by air circulation it will show you whether or not there is salt building up in your soil the edges will have a white or yellowish dried powder look to them If this happens do not water or flush but rather remove the top 1/4 inch layer of soil and discard it without replacing it, we do not want those dried salts going deeper into the soil.
Hope this helps everyone to understand why a fan is beneficial to healthy stem growth