KORALIA 4 UL 1200 gph 12W

Pros:

-Double action suction cup + magnet = awesome, super easy placement

-Very good build quality, minimum assembly

-Very energy efficient

-Super "soft" current, won't blast your plants/fish around like traditional powerhead

-Quiet

Cons:

-cable could be longer

-I found the same product ten bucks cheaper shipped from another store, only 1-day after I received 2 of these from amazon Boo

After using Maxi jets for 2 years, I switched to the Koralia. These powerheads feature a strong magnet to keep the device on the glass. No more failing suction cups! The waterflow "spread" is much greater, I notice the corals are flourishing. The Maxi jets direct water directly, which is not good for many corals that like a lower flow. I have 2 in a 75 gallon tank, a Koralia 4 and the 3, facing each other. This has worked out beautifully. Everyone is happy! I paid $36.20.

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We have two of these in our marine aquarium that were purchased from here. Amazon has much better prices than the local retailers do and shipping is fast. The magnets are great for positioning and help make placement more versatile.

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The idea is great. I must have got a dud because 1 died in a year and the other is still going strong 3 yrs later! They create a nice current in the aquarium. I bought the 2 for each corner of my 75 gallon aquarium. The fish seemed happier with the increased water movement. The fake leaves got sucked into them often and you have to clean it out. Quite the pain but oh well. The magnets were super heavy duty and worked well to keep them where I placed them.

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I've had two of these in my tank for over 2 years now and they have been fantastic. I don't think this review will hold much weight anymore as the Koralia 4's have since been replaced by the Koralia Evolution series but they are still a nice powerhead. Very efficient. I don't have any start up issues with them, and they are very low maintenance. I soak them in vinegar overnight and that is with heavy calcium chloride and sodium carbonate/bi-carbonate dosing for my reef.

I love the mounting system, I have been tempted to do the maxijet sureflow mod to them (I read you can take the impeller out of the kit and use them in the K4's to increase flow) but have not tried yet.

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