Hydor Koralia Nano Aquarium Circulation Pump, Includes Built-in Cable Protector, 565 GPH, Measures 2.4-Inches & is Ideal for Fresh or Salt Water Use

Ordered this last month couldn’t get a chance to set up my tank until just recently and this wave maker doesn’t work!!!And can not be returned!WASTE OF MONEY!!!

Don’t buy this for your aquarium giving to much of sound

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.

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

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.

I bought two of these 425 GPH circulation jets for my 40 gallon saltwater cube tank. I found it easy to install the plastic suction cups to the plastic ball on the unit by first placing the suction cup on the tile floor, and then wetting the cup opening and plastic ball with a small amount of saliva (yes gross but it works), and then firmly pushing the ball straight into the plastic suction cup socket. Once in the tank, I placed one unit in the front right side, and the other unit in the back left side to create a clockwise flow. They are placed mid depth, and angled towards the glass. These locations works great for both fish and coral. I also did not press the suction cups on the glass to hold the units in a static location, as the magnets are strong enough to hold the units from the outside of the tank without pushing the suction cup onto the inside of the tank wall. This allows me to move the jets time to time to create varying flows for the fish and corals.One thing to note is that these units, like any motors inside your tank, will add additional heat load to your water. I have a small fan blowing across the top of my tank set on a temperature switch, which increases the evaporation rate and quickly cools the water when the temperature rises above my limits. The fan was 1/20 the cost of any decent chiller unit, much quieter, uses minimal energy and allowed me to use the saved money to buy an ATO to keep the salinity at a constant level, and keep the tank topped off with the additional evaporation load.In summary, the engineering is sound on this circulation jet, and the price is fair. Just be careful installing the suction cup to the plastic ball pivot...

Smaller wave maker but has no noise and can really get the water moving for its size. Great product.