If it were me I'd turn off the fan its near and see if it improves. Like a day or so should do it. easier than moving stuff around.
I have this issue in my 125g with a powerhead near my fx5 intake. If I leave the airstones and powerhead on I get air coming out the output and it blocks my view of the fishies. lol
180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40b REEF- 34g Fresh Planted-working on- 20L FOWLR- working on
I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.