Quote Originally Posted by Ed_Geary View Post
Gravity III started with the 2009 Moomba's
Gravity III was available on the OBV at least as far back as 2006. However, when they changed the system to reversible pumps from aerators they did not also change the name of it. Gravity III means 3 ballast bags while Gravity I means only the 1 center bag. So, you kind of have to identify which version of the GIII you have. Almost every boat across the line should have reversibles starting in 2009.

More info in the Boat Archive here for those who are curious about their particular model:

https://www.moomba.com/models/archive