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.
I have the dual X350 cloud edition on my 315. Tank is 7x3x2 and I'm running them at 20% and the water is flowing. I do have MP's on the other side as well. But I think the gyres would work by themselves honestly