I live in the PNW on the coast, where our car seats will grow mold out of thin air if you don't sit on them often enough to disperse the spores! Our pictures hanging on the wall will grow mold behind them. Basically, anything can and will grow mold without any added moisture.

It's true that I have to keep the sides of my buckets stirred down or cleaned or they may grow mold. But NEVER had to throw out the FF.
Water on the top is just plain BS to me. Yes, I'm a NEED to know WHY person as well!!!

Thing is whatever lands on top of the water is going to seep down into the ferment as well. And then that water gets stirred into the ferment anyways. And what, the water on top is somehow magically NOT fermented? Plus that's how we get our colonies going from whatever is in the air. IF you DON'T stir your ferment, I can see this working to keep the mold out for a couple of days. BUT once your ferment runs out of sugars or whatever the good bacteria are feeding on, you WILL get mold colonies EVEN on top of the water layer! Yes I have done this, but ONLY when I didn't feed my ferment.
4-5 days seems to be a good feed out schedule for me, my birds, AND the ferment. And YES, the feed the ferment a little on a continual basis makes sense to me! But as LG said, we NEED to do what works for US.
@Ebarnes-21 Sounds like you have a pretty good understanding and awareness of the nutritional needs for your birds!

I had to ask, because I cannot believe how many people I've met here on BYC that feed JUST scratch... because that's what so and so told them to do. Agreed, I wouldn't add the meat to the FF. I do well if I know the WHY of something. It's not about being argumentative, but maybe just not blindly following status quo just because someone said so. I simply don't trust people. And I'm ALWAYS seeking the truth. I too welcome CONSTRUCTIVE criticism. And my hope is always to be helpful and not judgmental or finger pointing. I just want the best for people and their pets. I don't agree with everything in the tik tok article, but it's a great source of good basic info for keeping it simple. I always read comments to see what I might learn from people's experiences. But I also have to discern what is true verses hear say. So I take all the info, use what makes sense and forget the rest. Though I do keep the rest in mind, because I'm open to learning something new. And as my understanding grows, I switch it up if I need to. It's really cool when something clicks suddenly!
Oddly enough... New Zealand is the ONE place I'm interested in visiting!