I'm running an slw-15 in a 24% by weight kalkwasser solution (aka pure hell) for the last 110+ days now. Anything that can survive that long in that environment it gets my blessing at least. They use good ceramics in those things. For the price you can't beat it compared to some of that higher priced brand stuff.Any reviews on these pumps? they're like the Nero 5 clone. I've been a Jebao owner for return pumps since I started in the hobby like 3 years ago and not a single issue. I'm tempted to give them a try in the wavemaker's role. Any reviews on the SLW series?