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Guys have been using this solution for years in various forms. There are several versions posted in the Innovations thread. I tried the screen method a while back but abandoned it because the screen would sometimes get plugged up with slime or small pieces of kelp.
I discovered another way to solve the problem of the intake getting plugged while searching for a way to keep water from draining out of the tank when the motor gets accidentally turned off. (Search for post #37 in the innovations thread).
Basically, a 90 degree ELL with an extender tube is attached to the water output of the pump. This solves the drain-back problem. The added benefit is that you can blow air through this tube, (using a sprinkler riser inserted into the tube), to clear out any gunk that may be clogging the intake. With this setup you can also manually prime the pump be sucking in a little water.
It works great.
Bob
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