I've been running a reeflo squence pump for over 10 years, I recently replaced a seal in it which they sent me for free. about 1 year ago. still running strong.
I run reeflo pumps on all of my tank (except my nano). 120 2- darts 2 years. 180 1 dart 3 years. 850 3 - barracuda's 5 years. the one that been running for 10 years is on a tank in my store, which use to run my old 240.