Help choosing pump - Deep Blue Triton 3 vs Lifegard Quiet One 4000 vs Taam Rio 3100.

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I need a backup return pump, so I was hoping what you guys would recommend?

Deep Blue Triton 3 vs Lifegard Quiet One 4000 vs Taam Rio 3100.

Which one is more reliable??

Thanks.

 

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Just wanted to point out that I would need to move 500 - 600 GPH at about 4' of head pressure.

Thanks