Filter Too Powerful?

I've never tried one of those. I think the only way to see if its too strong is to judge it yourself. I know one of my bettas doesnt even like an airstone in his tank, while another seems to like playing in the current of a small filter. So it really comes down to that, and some common sense, if it looks like a blender filled with water and a fish it may be too strong lol.
 
I have a stingray 10 in a cycling tank and I found the current is surprisingly strong for a little filter and I wouldn't really want a betta in with it. I don't how different the stingray 5 is though. If the betta is already in the tank just spend some time watching him, seeing how he copes with it. You can stem the flow somewhat by placing plants in front of it or even strapping some foam over the outlet.
 

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