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What up dude...

I have a #1 I could sell you.....but honestly, a #1 is gonna do nothing in your 75.
At the least you'll need a #3.

What other pumps are you running?
I know, a lot of people say that but I like them because they're smaller than all the other Koralias and you can set them in places to get just a little flow here and there. Right now I have 2 other Koralia 1s, one is towards the back bottom right of the tank blowing the length of the tank and the other is on the front top left of the tank blowing the length of the tank as well. I have a Rio 32 Hyperflow as a return which is 1900gph at 0 head so I dont think it loses that much as it's only a 3 foot head if that. Then I have two custom returns on the opposite side of the tank, one is a mag 3 that just goes through my chiller and the other is a Quiet One 4000HH which goes through 3 pentair filters, fluidized bed, UV and dual carbon chamber. I don't use much in in-tank circulation because of all those returns...if anything I'd consider a 2 but definitely not a 3, I used to have two 4s and one 3 and it was overkill, had a 3 and two 1s and I didnt like the 3 so now I just have two 1s looking to get a 1 possibly a 2
 

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