Very true
I've never inquired about our water additives here, I probably should, but I kinda don't want to know. Our water here smells terrible and doesn't taste that great so we get bottled. I just use that because I never remember to let any sit out.
Most send out a water quality report every year. I specifically did inquire once because I used to keep fish... and no point in paying for a chemical (don't know what it is) to remove another (chlorine) if I didn't need to.

I enjoy our well water so much, it's almost appalling to even take a shower in city water!
Even if it's safe to drink (allegedly), doesn't make it yummy.
But then again, I don't have any control over what my neighbors put in the ground. And I found oil dump locations on my property after purchasing as a foreclosure. 

I'm feeling optimistic now that this might actually save us money on feed.
Nobody needs it and it makes for a sloppy mess the birds don't like to eat. Mix it as thick as you like. As long as you stir once a day and renew with fresh feed to "feed" the ferment (as needed), you will NOT get mold!
And if you get a little white stuff growing on the top, that is the SCOBY. Symbiotic culture of yeast and bacteria. The good stuff! just stir it in and continue. With different thickness you will find differing aspects. Some mix so thick they never notice the thinner layer close to the bottom. Different feeds may expand more or less. Just keep messing with it. Trial and error seems to be the best method. 
You won't be the first.
Yes, please try it and report back, how bad can it really be. Others have tried it and lived to tell about it.

