HydorKoralia Nano 900 Circulation and Wave Pump,Black

Arrived in perfect working order.I have installed in a nano (35L) reef tank and the output is perfect for this size of tank. No noticeable noise at all, and magnet/suction combined mount has left me confident that it isn't going to go anywhere.Not a negative again the product itself but careful positioning is required in very small tanks. MY 35L is at the low end of what it is designed for, but when I first placed it I had it positioned poorly and it blew my clove polyps right off the rocks. Just something to consider before installing incase you have something less forgiving than polyps.Only downside has been the relatively short power cord as mentioned in lots of other reviews. It works for my set up because I have the tank on a low table and the outlet isn't far away, but I can see that it would be a real problem for others, although easily rectified with an extension lead.

Excellent circulation pump, and absolutely silent IF fitted correctly.Those who say it makes a vibrating noise - mine did too, but this was caused by air trapped inside the rubber sucker on the inside of the tank. Remove the sucker from the inside of the tank to release the air, re-apply, and the noise stopped. Also ensure that you remove any debris - just like a filter, when the rotating parts become dirty they work less efficiently and less quietly.I've had two of these - bought one several years ago and sold it with a previous tank. Bought a new one for a new tank, as they're so good! Magnetic sucker on the outside makes it easy to move, and it's easy to rotate in (within reason) pretty much any possible direction.Provides good flow - I bought one to distribute CO2 bubbles around my 90L planted tank, and does the job nicely.

Is what it is, really. Works very well as a circulation pump (which I have it in use as) and helps keep the water moving at the other end of the tank. I have my filter set up at one end and this helps to keep the water circulation moving all around the tank. I alternate each week from moving the surface water to moving the undercurrents. The magnetic suction cup is great and it literally does not move or come unstuck - unlike other suction cups I have in the tank that give me jip every so often and need putting back on. Does need cleaning once a week, but that is easy enough as it comes apart and reassembles very easily.For the price, I would say a great quality item that is durable and does exactly what you need with no fuss. Only downside, I wish I had brought a slightly more powerful one, but thats hindsight on my own part!

Great quality circulation/wave pump. Very silent when fitted correctly. I used it to aim slightly at the surface for surface agitation and water movement, also slightly causes swaying movement on plants so makes the tank look more realistic and plants gently sway. Does a great job and does it well, good quality and good brand.Very powerful so ensure it's suitable for your size tank and fish, some fish don't like much water movement and would probably get stressed and worn out if they had to constantly swim in front of it, so make sure there are spots in the tank where fish can go where water ciruclation is calmer, just something to take note of. Highly recommend.

Great little pump for small aquarium to get water moving. Runs silent with no noise. Been running now for 2 months with no issues. Currently in 64l aquarium.

I needed a circulation pump for my 180Ltr Juwel Vision tank. I am going the planted route with heavy water movement and this tiny item fits the bill. Easy to install with the suction cup/magnetic feature. Sadly I have two issues with it....1) The mains cord is rather short - may or may not be an issue for you.2) The pump is noisy! I believe this to be vibration noise but it is annoying as I have my aquarium next to my bed. Moving it around a bit does help alleviate this a little, but the noise is still there. I am going to experiment a bit to see if I can add anything that can dampen the noise (maybe some thin cloth/felt) - will update if this works.The pump is good, the angling options are 'meh' but are not an issue for me as I have pointed it head on to the front of my tank from the back. Flow is definitely there, and it isn't a washing machine effect - so it is a smooth flow. The cord length is a bit too short and the vibration noise is definitely the faults that are not making me super happy. Hopefully my mod with felt will fix this issue.I think 3.5*s is fair considering the bugs I have with it. Maybe in a different setup this wont be much of an issue.

I wanted a wave maker that would gently move my plants giving illusion of a moving river in my 125 litre tank without blowing everything to bits. As my rams don’t like a current but my tetras do I now have a gentle current in a specific area leaving most of tank current free. This is exactly what I wanted to do as I knew it would be under power for the size of my tank. I have it come on with a timer & it is silent! Very pleased.

Great little device, great tank attachment! And yes it does rattle a bit to start with but settles down if left on, I've got a 192 litre tank (F90) and it's ok to assist with flow. I wouldn't say it's too powerful either - in hindsight I would have got the bigger model.

Die pumpe hat nen UK Stecker, dies sollte man wissen wenn man die kauft.Bei Geräuschen Pumpe schnell an/aus schalten um Luftblasen zu entfernen.Bei bleibenden Geräuschen kleinen o-Ring oberhalb des implellers anbringen.Pumpe läuft super im 100l Becken. Macht gute Strömung. Musste die Pumpe aber erst zum ruhig sein überreden.Für Stecker und nicht per se ruhig gibt's 2 Sterne minus

After trying it out in my 180 liter tank, I am quite pleased. I haven’t noticed any rattling yet but the cable is way too short. An extra 30 cm’s would have been perfect. The flow does seem to through a lot of bits around the tank but maybe that’ll help the filter suck it up. I’m still messing with exactly how to place it in order not to tire my fish out.

Noisy for a small pump