Dudley,
I picked up a small container of PhosZorb last weekend. Supposedly not the the most effective stuff, but I just wanted to test.
Also, I'd read about people with stuff bleaching, supposedly from dropping their phosphates too quickly or too far. So I figured the PhosZorb might be a good way to ease into it.
If it continues to look like the phosphate remover is helping, I'll probably get some PhosBan and run a small amount in the sump. Then after the tank adjusts, maybe put together a reactor.