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Hydro Koralia Nano Evolution 425
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The new and improved Koralia Nanos now come in 2 models, 240 gph and 425 gph, but remain super compact and efficient. The magnet suction support and sphere joint have been strengthend and modified allowing better flow direction. Both models can be safely run on a timer. Just choose which model is best suited for your aquarium and watch your creatures benefit from...
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Searched Hydro Koralia Nano Evolution 425 in Reviews
Nice supplemental flow 
| Installation and Operation |
This power head is as easy as any of the other Evolution power heads - install the head to the cup, put in place, and secure with the magnet.
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| Performance vs. Expectations |
I find this head to be nice as a supplemental flow in my 75 gallon. Granted, in smaller tanks, it's benefits would be more obvious.
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| Value for money |
I use it as flow for behind the LR. Spacing 5 of these across 48" does exactly what I need them to do.
I could have probably used two more larger powerheads to do something similar, but I like the subtlety these flow rates provide. I wouldn't have purchased 5 of them if it wasn't worth it.
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| Customer Support |
Have not needed to contact them.
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| Liked about it |
This powerhead provides nice supplemental flow to the tank. I use 5 of them across the back of the tank to keep dead spots up front where I can reach to siphon.
* Ease of use
* Up and running in no time.
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| Didn't like |
Two things:
I need to be careful when turning them back on. They sometimes start in reverse. Easily fixed by finding it's plug, unplugging, and trying again.
Lack of range of motion. I modifid the way the clip attached to the powerhead to get the "straight-down flow" results that I wanted.
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| Overall rating: |
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4.8 |
| Overall satisfaction: |
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4.5 |
| Would consider buying it again: |
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5.0 |
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Decent
| Installation and Operation |
It is very easy to install. Though getting the magnets inside the suction cups can be a bit tedious.
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| Performance vs. Expectations |
It doesn't feel or seem all that powerful. I fail to see too much of a difference between this and the 240gph model.
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| Value for money |
Great for the price.
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| Customer Support |
Haven't had to.
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| Liked about it |
It is very small, which makes it easy to place almost anywhere. It also disperses the flow well, instead of having one straight jet like most other powerheads.
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| Didn't like |
Doesn't seem like a 425gph pump. But maybe its just because the flow is dispersed. Also, the magnets will occasionally fall out of the suction cups.
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| Overall rating: |
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4.0 |
| Overall satisfaction: |
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4.0 |
| Would consider buying it again: |
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4.0 |
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Best in its class.
| Installation and Operation |
It was tough to get the ball joint inserted into the rubber receiver. Also not the easiest to aim, with a tendency to pull back toward center. This has gotten better over a few weeks. No other assembly required. Of course the magnetic suction cups are great. It sits nice and tight, right where I placed it.
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| Performance vs. Expectations |
Met my expectations are exceeded. The pump is incredibly compact and produces nearly as much flow as the 550 I have, which is twice the size. I have had no issues with reversal of flow; it performs perfectly.
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| Value for money |
Great value. The pump is of the highest quality, yet is 1/4 the cost of competitors.
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| Customer Support |
Haven't had to call.
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| Liked about it |
1. Amazing power, considering its micro-size.
2. Solid construction.
3. Strong, broad flow.
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| Didn't like |
1. I think they could work on the ball & socket mount; improve it.
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| Overall rating: |
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5.0 |
| Overall satisfaction: |
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5.0 |
| Would consider buying it again: |
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5.0 |
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internal use: spec289 spec311 spec316
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