What is the difference between water pump and powerhead?

[gu2high]

What is the difference between water pump and powerhead? Are they the same thing?

Can I use an AquaClear Powerhead outside tank and put it in tank stand and connect it with inlet and outlet tubes to the tank? Will it leak?

 

[gheitman]

Power heads and water pumps aren't necessarily the same thing. Power heads are designed to be used inside a tank and usually don't have any provision for connecting tubes except an airline. Pumps can be designed to run outside the tank or even inside a sump. From what you are talking about you need a real water pump.

 

[gu2high]

Thanks, gheitman. Can I use the powerhead in the tank and connect its outlet to a tube, which goes through an external CO2 mixter and another tube goes back from the mixer to tank?

The mixer is like this one,
http://cgi.ebay.com/Co2-Mixer-Large...ryZ66794QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Or, maybe connect the CO2 tube directly to the powerhead airline, but I guess this diffuse method is not efficient.

 

[gheitman]

I don't think the power head would work for you in this instance. It doesn't have the proper connections. The CO2 mixer looks like it is designed more to hook up to the output of a canister filter instead.