What Size Circulation Pump

rms

Fish Crazy
Joined
Aug 13, 2013
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Hi,
 
After posting about problems with plant growth I'm looking for a suitable circulation pump for my tank. I tried a Hagen 3200 but had to unplug it after a couple seconds as it looked like my plants and substrate were about to take a trip to the surface!
 
I'm now looking at two options, the 900 or 1600. Does anyone have a pump working in a 125l (33g) tank and if so, which would work best for me?
 
Thanks
 

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