question on flow in 6ft tank!!

[delta]

So before I place the order for 2 RW 15s I want to make sure that no matter of amount of rock work if running at the right % of power would it be enough for a 6ft 125 gal.. I wouldn't want to order these and find out its to much or not enough?? Lol ty for the help guys!!

You're in the same range as a Tunze 6105 and in a 125 that should be fine.