Hydor Koriala Powerhead
 

Well, I just ordered a Koriala #4, their largest model avalable that is supposed to put out 1,200gph. My question to you is, does it live up to these spec's? Any mods/improvements to it that will make it perform better?

?

Koralia 4
 

I've got a pair of them running in fresh water in my 210g while it sits in the garage. It's sort of their "job interview" so to speak. I've got to say that I'm really pretty impressed with them so far and I have no complaints. They are on either end of a 7' tank and the water is actually mixing in the center. I don't know of any modifications to them but for the price and having witnessed them in action for several months at my LFS, I'd say they are worth the money.

I think they put out more than 1200 gph. The new ones now comes with nice flow adapters. Huge improvement to the flow!!!

I hope mine comes with the flow adapters!

i brought my k4 off some guy on ebay for $45 and it came with them

I have 3 #4's on my 65 and I couldn't be happier, I do have them on a wakemaker so it does cause them to be noisey at start up but for what I got for the low price no complaints! I would recommend these to anyone.

I do like the K4 pumps but was told that the Gulfstream IIs and Sureflow Maxijet mods puts way more flow than the K4s.
can anyone else varify?

I myself are not too fond of that powerhead(not for my needs). It seems that it does not blow the current out directly in front of the unit but to the sides then forward,(if you could understand that) There seems to be a dead spot directly in front. The output seems to have alot of volume though..

They have a flow adapter that fixes this problem. With the adapter its more like a stream. Huge improvement IMO!!!

so with the adapter, do you think it will reach the center of a 6ft tank?
or do you think a MJ mod would do better for a 180 gallon?

Fedex says the magical date of arrival is 10/20, can't wait!

Are these the ones with that extra plastic part? I can't figure out how to install it. ??? My first 2 k's did not have this.

to install line the notches up with the front of the powerhead and snap them into place. They snap inside the housing hope this helps.

I thought that was how they installed, but I couldn't figure out how they snapped in. I guess I will try again. It isn't even in the instructions.
Do you know if they are universal and fit all 4 sizes? I could use them in my display tank more than my frag tank.

I don't know if they are universal, but to intall it there is a plastic circle/strainer that slides into a larger ring that when slowly and accuratly put on the output of the pump will fit snuggly.

oh and IMO I love this pump!

Okay. According to you there is a "larger ring" involved? I believe I have the little strainer thing, but no ring. I will get a picture up of what I have to see if it is even the same piece. Then go from there. Thanks

Nevr mind just yet. I got my box out and found the pieces (strainer and ring...they were stuck together) and noticed that installation is shown in the picture. I will give it a try and holler if I need help. =)

I like mine. I can't wait to phase out the rest of my MJ1200's.

Got it!
I remember that I was trying to install it on the inside rather than the outside. DUH!

They are great. Too bad they ar a bit pricey. I think that I need one more yet. The 1's and 2's just arent strong enough for my 55g frag tank. I may need to add a 3 right in the center or something.

I love it, i had to aim it up even more to stop the sand from moving in a 120g cichlid tank!

That is the hardest part about these powerheads. I took mine down to clean them and had the toughest time finding the same spot and angle for them so they didn't blow the sand around.

That is my only complaint about them. But I really like them alot. All of my corals get enough circulation and my fish love it!

Pricey? I only paid 30 for them at my LFS *major discount day* They don't shoot water like a jet, but they do push a lot of it around.

i ordered 2 of the #4's back in march, they didn't come with the added plastic part. Is there any way to get them to send them to you or do you have to buy them? Seems like if they modded it they should send out free ones to those who purchased before they corrected it.