Hydor Korlia Powerhead

[reefcat]

Just bought two 750GPH Hydor Korlia powerheads for my 35g and they are quite powerful for my tank, but they are rated for tanks with 30-50 gallons, i was wondering how long i should have them on in a day and whether or not i should turn them off during feeding.

[Aquattro]

I would leave them running full time. If you wanted to mix it up, maybe put them on 2 different timers and have them alternate with some overlap.

[doch]

Seems like a lot of flow to me... I would have gone with more smaller pumps myself. I had 2 450's and 3 smaller ones running in my 55 and it was lots.

[Aquattro]

Originally Posted by doch

Seems like a lot of flow to me... I would have gone with more smaller pumps myself. I had 2 450's and 3 smaller ones running in my 55 and it was lots.

Really? I just added a 1050 to my 50g and figure I at least need one more!

[reefcat]

ive run into a big problem, after about an hour of running one of them, all my fish are swimming low in the sand and are breathing heavy, they wont eat and i have since turned the powerheads off

[Lampshade]

Did you kick up a lot of sand? seems very odd, the powerhead should add oxygen to the tank if anything. Seems like you may have stirred something up.

[reefcat]

some sand was stirred up, but not a ton, i took them out just in case there was a something harmful on them but nothing has really changed this is very weird

[reefcat]

there was a film on the top of the water that it stirred up quite a bit, could there be anything bad in there that could harm the fish?

[toytech]

Did you clean them befor you put them in the tank , might have been some crud on them . I have 2 1050 gph in my 55 as well as a 300gph return pump and my fish love it , you can never have too much flow.

[reefcat]

I did forget to clean them thoroughly this might be the case, i am going to run my new skimmer later in the day to try and clean anything harmful in there, since i took the powerheads out the fish are looking a little better