Thank you for the feedback Marlin 65 and Hillegom. The gutter guard or equivalent is a good idea. I thought the fish were all "playing" in the flow presumably looking for zooplankton. I did not realize they would tire as they did. I thought they would find a place to hide out of the flow when tired. I have turned off the powerhead to reduce flow and this seems to have helped. I will see how they do overnight.
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