Hey Stan, your sure not wasting any time getting things done.
You could reduce suction at the opening of your 1&1/2" pipe by putting a T on it and also drill lots of holes into the T, then cover it in screening, this reduces the intake suction at any specific point and allows the screen to stay cleaner, also don't put the screen tight to the inlets on the T, I have done this to my 2" siphon inlets that supply water to my pond.
As long as you have some shade for the Trout that should keep the stress down on them.
