Do I need more flow?

Before I post keep in mind I am fairly new to SWF hobby, about 6-7 months in. My temperature is fine, with the breeze and fans running constantly. My tank is a at 76-77 it was a 101degrees today so it was at 78 lol but anyway my tank is 10g long. I have a 150 BIO-Wheel filter on it, it has been running for about 5-6 months..do you think I need more flow? in my opinion I believe it gives enough..and I don't have enough room in it for a big powerhead if I even need one so if I do need one or it would be better for my tank is there any ones that are real small or wavemakers that can clamp on to the back of tank on the other side of the filter?
 
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