Thanks rameez.. for now i've attached two long pipes to the existing pipes.. these pipes go into the water level.. so hopefully it wont sound like this..wow nice stuff...good to see something like this done in india..you could attach a long spray bar to each of the outlets..this would distribute the water fall and would reduce some of that pressure at one part of the tank only. hope it helps.
Ya mate.. jus waiting for a truck load of water.. just got a call that they are on the way.. gotta run the filters and check how it goes..yeah just extend the pipes to just below the water level and you will get less splashing. That should cut the sound a lot also