Reddit mentions of Savio Engineering WMS3600 WaterMaster Solids Handling Pump 3600 GPH

Well. Coming from the pond industry, where we'd be replacing shitty trash pumps on peoples ponds many times a year, they'd end up spending $50 a year for trash pumps, and replace them once a year (at least) or we'd install a nice pump, with a good mechanical filter (that's the key) to protect the pump and it'd work much better, and longer.

Anyway. Shinmaywa are fucking awesome pumps for the money. They last for years and years if taken care of correctly, and if you get the solids pumps, can push through good chunks of crap with ease. Otherwise, Pondmaster (formerly Danner) are great smaller range pumps. Whereas Shinmaywa starts around ~500gph, Pondmaster stops about 1000gph, but starts at about 50gph. The benefit to these is that they are mag-drive pumps, meaning that there isn't any physical contact between the impellor and the motor. So when you have to have water running back down the pipe, it doesn't hurt the motor like most direct drive pumps. Sadly, some of them are still oil cooled, whereas most these days are water cooled.

The Savio Solids Pump used to be the slave driver of the pond pump world. Could take anything and push it through. Sadly, they did something recently and now their seals aren't holding up. So they die after about a year, within the warranty, but still a pain.

Either way, as I said, it's really about the mechanical filtration. If you could remove the lions share of your floating chunks, any old trash pump would work fine, except they aren't MADE to run 24/7, but sometimes shit just keeps working. However, such pumps like these are made to take the damage that the lack of such filtration can dish out. While not perfect, they tend to get clogged if a big enough chunk gets stuck in there, they do a pretty good job.