Just to add to the List
2 Rio 600's, replaced 1 for not restarting
1 Rio 2100 (needs kickstarting sometimes)
2 Penguin 660, (replaced 1 impeller)
1 maxijet 1200 (it's a rock, never quits)
1 hagen 301 (sometimes needs a tap to re-start)
2 Rio 600's in Action running skimmers
One in a Pro 75 Sump and one on a CPR Backpack
Replaced the packback's 600 impeller after 3 years because it wouldn't restart reliably, replaced entire pump after 5 years with a fresh 600 for the same reason.
Sometimes the venturi gets cloged.. 99% of the time it's something they sucked up and you can blow them out.. the rest of the time it's calicum buildup on the inlet elbows.. easy to fix.
2100 as the returm pump for the sump
It came with the Pro 75 sump I bought used..
Replaced the impeller (1 vane was missing) and it's been working great for the last 3 years though it sometines needs a kickstart.
It isn't exactlythe best at moving water uphill so it'll be replaced sooner or later and used to mixing salt and water transfer.
The penguins, Hagen and maxijet are just for circulation in the tank. I'll remove the maxi from time to time and use it for mixing salt.