hooking up protein skimmer

I have a large amiracle protien skimmer.

This is the skimmer that requires a powerhead and airpump.

I purchases a Penguin 300gph powerhead, put it on my undergravel
filter. Hooked it to the protein skimmer and it shot water out the
top.
Seemed like too much power head.

So then I bought the next model down, the 145 gph.
This seemed to really fill it fast.

Is it possible to have too much flow in the skimmer?

My tank is 38 gal.
I think this skimmer is rated for 90gallon.

since I redirected the flow into the skimmer, my tank has almost no
water movement now.


Should I leave the power head on the undergravel filter.
then purchase a second smaller one for the skimmer?

thanks