Can too much filter current stress fish?

I just replaced my old Whisper Jr filter with an AC 150. The tank is
10 gallons. The Whisper shot its output stream across the top of the
tank and the current broke against the front glass. It looked like I
got a good amount of filter output from the Whisper when the media was
clean but I did not have excessive current flying around in the tank.

The AC150 basically drops its output down into the tank at a much
steeper angle and the current is breaking at the bottom of the tank.
This is creating a LOT more current inside the tank. At full blast
the plastic plants at the bottom of the tank (near the filter) are
flapping in the current and my Neons get tossed around when they go to
the side of the tank with the filter. My fantail Guppies seem to seek
out the full power current & play in it.

The main problem is where the AC 150 creates its current (at the
middle and bottom of the tank). I can turn down the flow on the
filter input and decrease the current somewhat, but when I run low
flow I am concerned that the AC150 may not be pumping as much as my
old Whisper was pumping. I think the Whisper was rated at 90 gph and
Hagen tech told me that when I run the AC150 in max reduction it can
drop to half its rated output.

Will this excess current stress out the Neons or cause any other
problems?