Wow! Is that much tumble really needed?
That is a pretty aggressive tumble, and I wouldnt suggest that much early on at all. But if you notice how even it is, that is what I am pointing out. I do tumble mine about this fast, but only because they have been on my system for 2 years, and I am scavenging those last remaining bits of phos and trates. And my system is balanced to the point that I (knock on wood) havent seen a bit of cyano or algae in a year.
