Jeff, the recommended dose is about one large tab to 200-300 gallons, I forget the exact number. However, I believe Todd posted that treatments of even 20-40x this dilution were testing without adverse effects on the corals. I have used a whole smaller tab (about 1/3rd the size) in a 10g quarantine without problems. I would suggest about 1/4 of the tab???

You need to leave it in for 6-7 hours, probably with circulation and a heater. Then just rinse and return to the tank.

If this came out of your main tank, you probably really should be treating the entire system.

Todd is probably the most experienced among MAAST in this area, Brian is probably second - maybe they can chime in here too?