Circulation pumps (wavemakers) on ebay

I am in the market for a couple new pumps. My old Hydors koralia 4's keep dying. I had 3 and now only one works.
I see on ebay there are a FLOOD of them that looks like exact either replicas of the old hydors or they are hydors with different brand names on them.
Has anyone bought them and how are they?
There is also some new dual style one. Its like two pumps in one housing.
Thanks...

 

Anyone? or maybe any info on the original Hydor Koralia electrical problems that I have?

 

I had these in my 125 setup they work... the power cords on them are really short tho like 4 foot. 2 1300GPH Wave Maker Coral Fish Pump Aquarium Powerhead 5000L/H Marine Vibration | eBay

 

Looks more like a Tunez knockoff. I worry about those 4 little suction cups holding it on. One of my roomates Korlia's just violently shorted out and have been looking at a replacement. His Dogface puffer likes to wedge between the powerhead and glass to sleep and I worry it would pop off.

 

Yes these are the other ones. The seller said he thinks they are too powerful for a 90. What do you think?
He keeps suggesting I go with these - they are 800GPH.
eBay - New & used electronics, cars, apparel, collectibles, sporting goods & more at low prices

 

I have two of them of the twin type on my 70 gallon for just about a year now, they have worked well. I modified them by taking the suction cups off and glueing a magnetic base to them. then using a magnet on the outside to secure the wavemakers to the back of the tank.

 

How does the flow seem with those doubles? They look interesting and Im wondering if they create even more turbulence 'wave simulation' because they are blowing so close together? Or is it just like having two shooting instead of one?

 

They do seem to also make them with magnet bases.
6W 3000L/H Vibration Pump Wave Maker Magnet Fix J101B | eBay
12W 5000L/H Vibration Pump Wave Maker Magnet Fix J102B | eBay
http://www.ebay.com/itm/Aquaruim-Magnet-Base-6000L-wave-maker-pump-/250984880450

 

Not knowing about the dual propeller powerhead...Though I was just looking at them before I settled on the Evolutions....But my opinion is..Stay away from the suction cups.
I have had that style and they were always falling off the glass....and "generally" your better off staying with a known good product..Hydor, ect.. jmo : )

 

Talk to Steve Wright about them. It's what he uses in his tank if it's SunSun.