Good powerhead for a very small tank By SurlyT on 6/4/2015
SurlyT would recommend this product to a friend
Nice little pump if you don't need to push water very far or hard. In a 10-20 gallon tank they're probably just right. But I have 2 of them in a 28g cube (21" on a side) and the flow doesn't get all the way across. I either need 1-2 more of the 240s or an upgrade to the next model up.
Haven't owned them for very long so I can't speak to their longterm reliability, but I've had good experiences with Koralia PHs in the past.
Compact By Guahan Reefer on 4/12/2015
Guahan Reefer would recommend this product to a friend
I own three of these. 2 in a 15 gallon Nano and 1 in my first chamber of a 20 gallon refugium. Suction cup magnets so you do not have to worry about it detaching from glass/acrylic. Great water flow for its size.
Small, Compact, and Effective By Guapoveli on 3/25/2015
Guapoveli would recommend this product to a friend
They get the job done plain and simple. They don't take up a lot of space.
Good for the price By jesus on 1/22/2015
jesus would recommend this product to a friend
First I'd like to say for the pump does its job for being so inexpensive, how ever i highly doubt they provide anywhere near the claimed GPH. But they do well in tanks that are not that long or deep since they cant push water far at all. I had a 425 in a 4 gallon pico tank and it was much weaker than I thought it would be but perfect for the tank anyways since at 425 GPH it would have been over 100x turnover. If you are in the market for a koralia 565 I'd save a few more pennies and buy a jebao RW4 instead.
great choice By Christopher on 12/24/2014
Christopher would recommend this product to a friend
I run two of these in my 29g softie tank. The flow it gives to the Xenia is wonderful.
Small, silent with powerful magnetic suction cup mounts. By shawn on 7/1/2014
shawn would recommend this product to a friend
Has wide flow and pushes alot of water for it's size. At 3.5 watts It's perfect as my battery backup pump. Mounted high and pointed up to break the surface. Should run for 6-7 hrs in a power outage.
Nano 425 By Monica on 4/25/2014
Monica would recommend this product to a friend
This is a nice little pump. I have one in my IM mini 30g. I need more circulation than just one pump. It's great little pump just need one more on the other side.
amazing pump By Damian on 2/5/2014
Damian would recommend this product to a friend
Very small, very powerful and super quiet, awesome in my 10 gallon reef tank recommended 100%
Does the Job By Bradon on 1/16/2014
Bradon would recommend this product to a friend
Smaller than I anticipated, but just as much power as I had hoped for.
Great product By David on 12/14/2013
David would recommend this product to a friend
Quite and just the right amount of flow in my Nuvo 16. Corals and fish love the extra flow.
Great for nano tank By Loren on 9/15/2013
Loren would recommend this product to a friend
Very small size great for nano tanks. Easily controlable. Takes care of flow in the hard to reach places to keep deutritis to a minimum.
Just right for my Nuvo 24 By Barbra on 9/7/2013
Barbra would recommend this product to a friend
I have 2 of these in my Nuvo 24. I purchased to supplement my Nuvo 24. Produces just the right amount of current to allow awesome coral growth. Small enough so that they blend in well. I don't like to see a lot of hardware in my display.
nice little pump By jim on 6/5/2013
jim would recommend this product to a friend
This pump works great, is super quiet, and gives just enough flow to move the water in our 10 gallon tank.
Nice By Toby on 4/8/2013
Toby would recommend this product to a friend
Bought this improve circulation in refugium. Works great!
great powerheads By Cory on 4/5/2013
Cory would recommend this product to a friend
I have two of these on a Koralia Smartwave controller in my IM Mini 38 tank. They are great and I love the magnet mounts. I have a number of Koralia powerheads scattered around the house on various tanks and they have all been great. In this case Nano powerheads are perfect for the smaller tanks and are just the right amount of flow to create the current you need to keep debris pockets from forming while at the same time not turning a smaller tank into a whirlpool. I also have the smaller Nano on my IM Nano 8 tank and appreciate the small footprint seeing that I have limited space.
A Value Product By Clayton on 11/28/2012
Clayton would recommend this product to a friend
The Koralia Nano is a very durable and reliable powerhead. It's also a great value for buyers on a budget. I'm using the 240 GPH version in a 8.7 gallon nano and it's providing the perfect amount of flow.
Great for small tanks By Sam on 11/22/2012
Sam would recommend this product to a friend
I got this for a little 10g and love it. It gives great flow and doesnt take up much space at all. When i took down the tank I gave it to a friend for his first ten gallon half moon, he loves the look and it keeps his tank water moving perfectly and his tank looks great now.
They do the job By Earl on 9/13/2012
Earl would recommend this product to a friend
I have two of these on the sides, toward the front of my 50 gallon tank and they are perfect. They provide enough current that is keeping my corals happy but not so much that it is blowing sand and corals all over the place. I have two larger ones on the side toward the rear and this seems to work out perfectly. They also aren't so big that they detract from the beauty of the tank.
Good Value By Robert on 8/1/2012
Robert would recommend this product to a friend
I have used this pump now for a number of months and highly recommend it. The entire unit--particularly the mount--is well built and is is almost completely silent.
Perfect for nano By Joey on 7/9/2012
Joey would recommend this product to a friend
Absolutely wonderful in my 7 gallon nano tank. Has been working flawlessly for over a year.
Perfect for size By Michael on 6/20/2012
Michael would recommend this product to a friend
Absolutely perfect for my 15g tank. Fish love it and play in it, very quiet, and isn't too powerful.
Compact and LOUD! By Gianni on 4/30/2012
Gianni wouldn't recommend this product to a friend
I own a few Koralia's (2x 1400 and 1050) so I thought I would try this nano for a dead spot I have behind my rocks. The egg sized form was perfect as I needed something that would fit in a tight location. After plugging it in the first thing I noticed was how loud it was. It sounds like a distant gas powered leaf blower. My 1400's are pretty quiet. You have to put your ear to the glass to hear them. Not with the 425. I can clearly hear it buzzing 5 feet in front of my tank. I will try taking it apart and seeing if I can quiet it down but so far I'm not impressed.
Good little pump By Otis on 3/26/2012
Otis would recommend this product to a friend
I've had this pump about 8 months now. It's small living up to its name, but small in performance it is not! This is the main powerhead in my 20 gal tall reef, and it does a good job . I wish I had two!
small and quiet By Jason on 2/25/2012
Jason would recommend this product to a friend
I have two nano 425's in my 28 biocube. they are doing the job good flow and quiet.
Good water movement for a nano. By Frederick on 2/20/2012
Frederick would recommend this product to a friend
I have two of these nano pumps running in my 29 reef. The magnets keep them from moving and they run extremely quiet. As other reviewers have commented, the cord tends to pull on the pump turning them and making it difficult to maintain the angles I set them at. I would say that these small units are a good value for the money.
Great for nano tanks By Tyler on 2/15/2012
Tyler would recommend this product to a friend
this powerhead works great in my 33 long reef tank, moves water around well.
Good product By Shawn on 12/11/2011
Shawn would recommend this product to a friend
Perfect for a nano tank. Won't blast your corals constantly.
Good flow for a small pump By Chris H on 7/14/2011
Chris H would recommend this product to a friend
I picked up two of these little pumps. They run very quiet and the magnet holders keep them from moving up or down. Like another reviewer commented, the cord tends to pull on the pump turning it and making it difficult to maintain some angles. All in all an excellent value.
Small Package By Tiredreefer on 6/17/2011
Tiredreefer would recommend this product to a friend
This powerhead hold ups to its name as nano suggest to mod to increase the flow.
great By Aron on 4/27/2011
Aron would recommend this product to a friend
I added this powerhead in my 38 G FOWLR to increase the flow in one section of my tank. It does exactly that and wow it's small! the nano lives up to its name.
This is a very good product but due to the small size of the powerhead and the thick electric wire that is used, it's hard to keep the powerhead pointed "straight" because the wire on the back keeps pushing it to a direction. hard to explain but hope you get my point. either way to biggie!
nice water movement By Erick on 12/3/2010
Erick would recommend this product to a friend
using on a quarantine 20ga. simple to use/set up good water flow