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I'm not buying the bacteria, I left my tank at 1/4 full the summer my Merc blew, since I knew I would need to drag the boat around and didn't want to trailer the weight. I added stabilizer but nothing else. I filled the tank after installing the E-Tec (6 months later), adding a new rancor filter and replacing fill and vent hoses. I had no problems at all, so something doesn't add up.
Let us know what they find out.