Wood and Singapore Shrimp

Buddy Wiese and I recently purchased shrimp where their physical 
descriptions are similar.  These little guys have given me crystal clear 
water.  The algea isn't gone...yet.  I've been watching the shrimp closely 
and have not seen them eating it. But, all the teeny-tiny little bits of 
"stuff" that float in the water are gone.  I use a micron filter on occasion 
and that did not get my tank water this clean.  I could still see little 
"dust like" particles floating using that filter.  Buddy, what's going on 
with your's?
Rochelle Williams
williaro at ftmcphsn-emh1_army.mil