20G cube tank flow advice needed

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ImInOverMyHead

ImInOverMyHead

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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.
 

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flow looks completely fine
everything is wavy and happy
 
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