I'm running 2 rw15 in my 180 which replaced wp40..... The rw are a bit smaller but have a wider spread, the wp have a more focused stream. Also the available modes and power adjustments of the rw series are way better than the wp. Again power is not lacking I can send a 3" wave across a 6' tank and over the top if not careful
The rw series is more like the mps. The pump is slighter smaller than the wp. The flow is wider unlike a straight stream. Believe there's a few more option in settings as % of flow and your able to have a master and slave.
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