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Pump/powerhead question


I have a circulation pump working clockwise and a return pump .
I have had a mp40 at each end of tank.....which is 4 foot bow front 120 gallon .
Both vortechs have recently failed so I am thinking of replacing with jebaos .
2 x RW15s would be like for like but I think that this is more than I need .
Question is shall I just get an RW8 to go against flow or stick with 2 x 15s and have them running less power .
Not a lot of difference in price .


I would go for the 15s as price difference is so small and can always use if you ever upgrade

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