Dr. Ron - thanks for your input. I wondered about MarineSnow.... The reason for add the DT or MarineSnow was to feed the baby Brine shrimp so that they don't croak while waiting to be released and hunted. I "dose" my tank with CoralHeaven for feeding the corals and wasn't really adding the DTs for that purpose.
darrellh - this is in the planning stage and not actually in use. But, no, I have no auto anything on my little 46 gal bowfront.
Everybody - I emailed Drs. Foster & Smith about the Pro Feeder described by SmartWrasse asking how it worked. Here's info from Greg:
"The Pro Feeder is designed to allow the hobbyist to provide a natural feeding pattern in the system. The feeder will use frozen foods to slowly dispense food over the coarse of several hours.
The unit requires only an air pump to do the job.
Simply place frozen food into the food basket, connect an air pump to the air inlet at the bottom of the unit. Close the needle valve, and then open it a little at a time until the water level is just under the food basket. The ideal setting will cause the water to just splash the food."
It can be seen at this link:
http://www.drsfostersmith.com/product/prod_Display.cfm?siteid=6&pCatId=4436 I do hope that I am not breaking any rules by including the link here....
I thought it looked promising for the gradual feeding of frozen food.