Hmm, maybe I should try to adjust my power head on the other side like you do? I feed a variety of stuff as I am sure you do. It only seems to be a real problem with frozen foods, bloodworm's the most. I pre-soak the other stuff in a little cup with tank water and then do like you do place it in front of the one power head and most foods will go toward the overflow but then get pushed back in toward the center. I think I just got the impression it was always happening and just started turning it off during feedings but after posting I thought lets see and left it on yesterday and I fed dried
krill and shrimp and none got sucked up. I also put a bag on the bar that delivers the water to the
refugium and saw a huge drop in my
nitrate levels. I think I was over feeding as well which was not helping the levels.
I have both my power heads pointing in kinda the same direction as when I pointed one down wards it was blowing sand all over the place and causing a big bare spot on the bottom so they are both pointing semi up wards. But maybe I should look at that as well and maybe try to place some rock around so it does not allow the power head to blow it like it was.