New power heads

[superdave07]

I got two new Koralia Evolution 750 power head. My question is how do you get the right movement in my aquarium? Where do I place them to get good movement? I have a 21 gallon wall mounted aquarium 65x26x4

 

[Grizz]

i'd put them on each end and aim them at each other the crash will cause random flow thru the tank i use the same two on my 90 gal. and have great flow. put in a little purple up and you can watch the currents you want to avoid dead spots. You may find that just one works

 

[superdave07]

i'd put them on each end and aim them at each other the crash will cause random flow thru the tank i use the same two on my 90 gal. and have great flow. put in a little purple up and you can watch the currents you want to avoid dead spots. You may find that just one works

I have them set up so I'm getting two big circles on the left and right is the good?