Circulation pump too strong?

These fish have evolved to live in fast moving rivers. Way I see it, the Amazon River and all its tributaries move VERY fast when it rains hard. These fish HAVE to be able to handle that. You're getting 10 times turnover, I don't see a problem. I think your Red Devil will figure it out pretty quick.

Try putting the pump output at the surface so the most force is along the top of the water, rippling the surface for good air exchange. That way, fish can hang on the bottom or mid level to get out of tbe current a little bit. Put a big driftwood so they can get behind that. I have an Eheim 2262 in a 125 that's what I did. Even small 2 inch fish figure it all out. Few days, they're all over the tank floating in heavy current, negotiating current changes, no problem. They know what to do.


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you could put it on a timer for a while and watch to see how they react after a while. if they always go and hide from the current then you know they prefer the slower water flow.
I would run it at least some though, many fish love playing in the current.