Well I have been thinking about this a bit this weekend..
Lofus - This is a DIY take off of the Tunze stream style pumps and I would hardly say that they are inefficiant at moving water. To my understanding the prop moves a higher volume of water at a lower rate so rather than the typical jet from a normal pwerhead you get a wider flow at a slightly lower velocity but much more volume moved. (Hmmm it is still early so this may not make sense)
StirCrazy-
I had wondered about that....I wonder if there is anything that could be done to resolve this (would a small disk of teflon improve this?)[/b]
I wonder how the Tunze pumps get around this...
Was this what caused the pumps with the Reeftec mod to crater?
JG
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