Craig, thanks for the pickup.
Shelby, What did you have these in and can you confirm the alternation of pumps? I came across a review that indicated that the controller can only alternate the volume from 30% to 100% but can't seperate the pumps while it is doing it. I have a 120g that i am building up with a center overflow that these might work nicely on sitting on either side of the overflow.
Thanks.
Kevin