Ill have to go back and do some reading to get the correct micron size, sorry cant remember numbers all that well lol. If you have a high fish load and feed your fish a bunch the clams can filter some of that food and fish waste out as well.
The march meeting has allready come and gone, not sure where or when the April meeting is, odds are I will not be able to attend the april meeting since ill be tied up for three weekends that month....But you can purchase some Dts on line or in Little Rock, im not sure if memphis carrys the stuff or not....its usually for sale on ebay as well live home cultured phyto....
its pretty easy to culture and super cheap, if you get in a pinch ill mail you some...the only thing is Im not sure how well the stuff ships and how long it will last in warm weather...