I agree with theotheragentm on that fact that won't provide a true current - but its flexibility with direction would be very helpful for addressing dead spots behind
lr and such.
I know lwb and myself have deadspots because of plants, so this could easily be positioned behind them to assist the overall current provided by other means.
I just found this last night, and I think that this could be very useful - I hope someone posts some experiences with it...of course, if you want this same thing without having to put a cord in the tank, this
one may be a better choice