The left side of the tank seemed as if wasn't getting enough flow. The overflow seemed to block the Gyre. I bumped up Gyre but still not good. I should mention Gyre was making noise so out new find in while soaking old ones. I cannot replicate the pulsing now. It seems I put it together different. Anyway set it on constant still left side was very little movement. I dug out a old Koriala and placed on left. Is this to much flow? See video.