Rev,
I'm experiencing the same clean-looking water when I backwash, too. Very surprising. I really expected to see a lot of solids and at least the same color water as is in the pool, but maybe the water color is so bad because we're seeing the whole depth of the pool compared to the amount in the little spyglass.

I'm taking pictures as I continue the conversion and will post them when I'm done. This is soooooo time consuming, isn't it?!

--Deborah