Después de un año...excelente y estupenda...sin problema alguno. Nunca decepciona.

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Amazon should not be selling this pump to UK consumers. It comes with a USA moulded plug and is rated at 115v 60Hz, not the 240v 50Hz that we operate on here in the UK.Didn't realise this until I had cut the moulded plug off and fitted it with a UK 3 pin plug. Plugged it in - the noise was alarming and at that point I realised that this pump is for USA market and not UK.Going to try to return this, but as I've cut the plug off I'm not so sure my return is going to be that successful - oh well :-(

Product came in damaged box and was faulty didn’t work. I no did return the or product back and got refunded.

Silenciosa, imán con buena fuerza de agarre, buen flujo de agua

colocada en acuario de arrecife de 29 galones. Junto con esta bomba tengo 2 cabezas de poder en la superficie. Ya en conjunto hacen un trabajo adecuado de proveer corriente dentro de la pecera. Si solo fuera la bomba me parece que habría sido insuficiente para mis propósitos (tengo corales). o bien, necesitaría al menos 2 bombas de 425 para proveer suficiente flujo.

No me llego

Excelente desempeño para el tamaño q tiene. Mareriales de calidad. Totalmente silenciosa y discreta

tal cual se ve en la foto llego a tiempo y trabaja muy bien justo lo que necesitaba

Buen producto, aunque me esperaba mayor potencia en el flujo y mejor movilidad en el direccionamiento del mismo. El iman de fijación trabaja bien.Actualización;Las dos bombas empezaron a girar hacia atrás. Investigue que hay un bumper de goma que impide que la bomba gire hacia atras. Con el uso ese bumper se cae. No hay manera de comprarlo, hay que adquirir la bomba nueva. En este caso, es una bomba desechable. Prefiero la fluval cp2 que es la equivalente a esta y no tiene ese problema.

Me ayuda a dar movimiento al agua. Lo puse donde está el filtro CO2 y ayuda a distribuir las burbujitas. Silencioso. Se puede modificar su ubicación por los imanes. Pecera de 500 lts y me funciona muy bien sin perturbar los peces.

I've had this pump before and they are top notch. Works perfectly in my 10 gallon cube, and is so much easier to hide smaller then the Fluval Sea stock circulation pump which is a lot bigger and more difficult to hide, I will be buying another to replace the Fluval one as 2 pumps work better then 1 at keeping up good flow on the display side.For the price point this is the best circulation pump you will find in my opinion.It's also not made in China like a lot of aquarium items are, but made in Italy which seems to provide a better quality product overall.I don't find the 240 bad for a 10 gallon cube when used in conjunction with another pump, not sure I would use just 1 240 in a 10 gallon and up though, but I always use 2 smaller pumps vs 1 larger one so I can get more random flow and for my purpose this size is perfect.Amazon's price was a bit higher, but with being a Prime member it still came out cheaper then another online store who was 3 dollars cheaper but would have charged 9 in shipping so despite the higher price on Amazon, it was cheaper in the end.

To start my review I would like to state that even though a power head says its for a 20G tank and you have a 20G tank, doesn't mean you can only by one power head and be like "Yay, I have flow everywhere!". You need more than one to achieve appropriate flow through your tank, especially if you are hosting corals. If hosting corals you need to have at least 30x the flow vs volume of your tank. So if you have a 20 gallon nano you would need at LEAST 600 gallons per hour of water movement.I have seen people complain about the tank ratings post by Koralia saying they are inaccurate but I beg to differ. The ratings are there to guide you which power head provides USEFUL FLOW WITHOUT POSSIBLY UPSETTING INHABITANTS. With that said, I have had experience with all three Koralia nano power heads so I will be reviewing all three.---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------All three pump generally are designed the same way. I find them very reliable and quiet but they can click when they start up so using them with a wave maker can be annoying. The magnetic mounting is probably the best feature. No more suction cup issues here! You can even slide the magnet on the external side of the glass to move or adjust the location of the pump. These magnets are STRONG so be careful not to let them slam up against your glass! Directing the power head is a little meh. The amount of tilt you get is limited and the power cord works against you and gets in the way. They all come apart the same way and are generally easy to clean. Now for the individual remarks......First up is the Hydor Koralia Nano 240!!! This pump is pretty timid. It could be used solo in a 5 gallon. For a 10 or 15 you should consider getting 2 unless you are getting some decent water movement from another source such as a Hang-On Back Filter. Another useful feature is to simple remove that one annoying dead spot in larger tanks. They are small and can be nicely hidden from sight.Second up is the Hydor Koralia Nano 425!! This is a sweet little pump and works great for water movement. I had three ( an example of needing more than one which came out to 1275 gallons per hour ) in a tall 25 gallon marine tank and they did a great job! From personal experience I wouldn't used these in a tank longer than 24" like a 20 gallon long ( 30" long tank ). It can't really reach far enough to the other end.Lastly is the Hydor Koralia Nano 565!! This a new nano pump from Hydor, The pump basically looks like a 425 but with some mods to push more water. It works fabulous and if you have a 20-40 gallon tank, I would skip over the 425 and go straight to these. The extra flow is worth it, especially if your tank is of the marine type.Overall these pumps are great. They run quiet and don't need lots of maintenance. There are fancier pumps out there for sure, but spending $50 on these versus $200 on those, these pumps are a win.