You're welcome. I can't recommend Coralife products, as they haven't impressed me in any way. I was looking for a compact powerhead system for my small tank when I ran across these pumps. I read a lot of reviews, and the main complaint was they got dirty quickly, and would stop pumping. The WP series have small openings in the case, and if there's a lot of debris and algae in your tank, they will clog up. I never had one stop pumping in over a year, so I thought I'd try their newer series, the RW. The openings on these pumps are much larger, so clogging should not be an issue. The main reason I chose these pumps is because of the power they deliver at their price point. I have 4 Sicce Voyager 3 powerheads in my 125 gallon tank, and they flow 1200GPH each... supposedly. I paid like $70 each for these, and had to have a separate wavemaker to control them ($75). The two RW-8 pumps come with individual controllers that communicate wirelessly. Set one as master, and as many as 7 more controllers as slave(s), and you control all of them with one controller. The two RW-8's (800-2000GPH each) will move almost as much water as my 4 Sicce pumps (1200GPH each). I think I'm going to downsize to a pair of the RW-4's in my 40G, retire a couple of the Sicce's in my 125G, and use the RW-8's to replace them. The Sebao RW-4 is rated up to 800GPH, and has the same wireless features as it's bigger brother, so a pair of those should be a perfect fit for your 29G. They also use DC current on the pumps, so they have soft startup... in the right direction.
I cannot, and will not, recommend Hydor Koralia pumps for your tank. I had 4 in my big tank, and they were okay... until I hooked them up to a wavemaker. It was horrible. They operate on AC current, so they randomly started in reverse. Hydor came up with the brilliant idea of putting a rubber bumper to catch the blades if they start in reverse, and bounce them back in the right direction. I think they started in reverse every time, because they always made a loud clicking/clacking sound every time they started up (check reviews). On a wavemaker with 4 powerheads, this can be a lot of startups in a short amount of time. My wife MADE me buy new powerheads the day I hooked the Koralias up. I sold them for less than half of my cost. Good riddance. I'll admit... they make great powerheads for mixing saltwater in small containers. If you want a steady flow with no start/stop cycles, they're great.
I only recommended Jebao pumps, but you be the judge. Check reviews, and keep an open mind. There are other great powerheads available, but I haven't found any that have the same features at their price point.
