20G cube tank flow advice needed

[ImInOverMyHead]

I bought a single 1/2” RFG and the flow mixed with my hygger nano powerhead reach the whole tank but the flow seems low compared to what it was before. Should I leave it? Or switch to dual 1/4” RFGs? My return pump is and power head are at max settings.

 

[Reefara]

flow looks completely fine
everything is wavy and happy