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koralia powerheads.

tyke_uk

Member
Joined
10 Feb 2009
Messages
40
Location
Wakefield
Has anyone had any probs with these powerheads, ive got two korolia 1 in my tank for circulation.One is fine but the other will be working with no probs then start getting noiser a irritating vibration sound.So i cut the electric switch it back on and it ok for hrs then returns checked the impeller seems fine the unit is only couple of months old many thanks.
 

squiggley

Member
Joined
18 Apr 2008
Messages
218
My koralia 1 does make a vibrating noise. I found the problem was the cone bit you put on the end, if I keep that off then all is quiet but if I put it on its alright for about 5mins before it starts for vibrate
 

tyke_uk

Member
Thread starter
Joined
10 Feb 2009
Messages
40
Location
Wakefield
cheers ive got that little piece on ,ill try it without only put it on because i was concerned about fish swimming in and turning the tank to sushi :D
 

SKP1995

Member
Joined
9 Jun 2008
Messages
147
Location
London
Mine occasionally gets noisy, I just switch it off then back on, usually accompanied by a load of CO2 bubbles being released which seems to be the cause of the noise, at least in mine that is.
 

TLH

Member
Joined
15 Jan 2009
Messages
183
Location
Northants
My Nano's can vibrate a bit if debris gets trapped on the outside. There can be a problem with some Koralias though where the impeller starts hammering in and out on the spindle. You can solve this by cutting a little washer, to go over the spindle before the impeller goes on, out of soft rubber like the tube foam air diffusers are made of. I think Hydor may even send you some proper ones, if you write and ask, free of charge.
 

Ed Seeley

Member
Joined
3 Jul 2007
Messages
3,258
Location
Nottingham
I've also found that the orientation of the unit makes a big difference. Try rotating it around a bit so there's no way any gas bubbles can accumulate in it.
 
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