Is this too much flow ??

Hello guys. my tank is a 30 gallon , 30 lbs of rock prox, 30 lbs of sand aprox , have a small CUC plus 3 small fish , I have 2 koralias 750 gph but when I turn them on my tank become a snow globe for about 10 minutes and my fishes move to one corner of the tank and stay there forever and they seem to struggle a little when they try to swim .... I wanna know if this is a normal thing , is this flow too much for a 30 gallon ???

here is a video of my fishes hiding from the flow ..

30 gallon reef - YouTube

thank you all

 

Looks fine to me, I would see if you can fix whats making those bubbles in the middle of your tank.

 

I have a 24g nano cube with two 250 and a 550 and it seems good for me.

 

Try moving the pumps closer to the surface and aim them parallel to each other from opposite sides of the tank.