if your rock is uncured then its going to smell for a while. until mostly everything dies and then comes back to life in basic terms.
the noise that you are hearing is the air getting sucked in from the pump . that is a easy fix.
you can take you stand pipe out and enlarge the hole. that will work what type of return pump are you running on your tank?
the average they say is
3/4" 500 gph
1" hole 750 gph
1.5 1500
2" 2000 gph
but on my tank i have 1.5 " hole and I'm running a mag 12 on there you dont really need a huge pump to circulate your water. the key is contact time for your skimmer to clean your water and the heaters to heat it. IMO/IME
you avoid bubbles that way going to your return, you get more time for skimming ,and heating of the water, and alot of times people will add devices to move the water around like vortechs, tunze's closed loop.
hth.
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180 starfire front, LPS, millipora
Doesn't matter how much you have been reading until you take the plunge.
You don't know as much as you think.
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