I haven't had any issues with the new bags tearing yet.
I walked away from filling my iron filter the other day and the tanks overflowed onto the basement floor. Sure glad the feed bag was plastic!
I am bummed the minimum order for the astaxithin enhanced feed now is two tons. I'll have to add it myself now.
I was wrong the new bag is not waterproof (perhaps at the seam?) although I'm sure it's moisture resistant. I had to pick out wet feed from the bottom of bag.