So, is there anyone who could add to the AquaClear discussion Convict and I are having regarding the flow control on these HOBs? Essentially, is it "okay" that I keep the flow on mine turned to the minimum to reduce the return flow turbulence for my fancy goldfish...and will this negatively affect filtration?
Yes that's how I run all my AC's and it will not negatively affect filtration on high or low flows. It's really up to you how much flow you want the filter is made for that kind of thing so keeping it on one setting more than the other is just a personal choice.