Folks, if you've recently upgraded or renewed your annual club membership but it's still not active, please reach out to the BOD or a moderator. The PayPal system has a slight bug which it doesn't allow it to activate the account on it's own.
It's a great skimmer and should do fine on a 150. I don't know anything about the G3 to compare the two. I'm running it on a 400 Gal system so it's a bit undersized.
I'm planning on winning the MR-2R at the holiday party so if you want another one let me know