Yes, this subject has been discussed on multiple threads/forums because it affects so much in our tanks..........as you have discovered
This is why current/flow is important as the increased biomass tends to curtail the current and the distribution of nutrients/c02. Plants suffer and that allows algae to gain a foothold.
Another reason TIMELY pruning is important.
I have just added a HOT 25OGPH magnum and a 250 gph pump (with a sponge) to my 180 to experiment with this. I am hoping the increased flow will help with nute spread......
My rainbows LOVE the extra flow and spend all their free time playing in it...