Antrias' Venture into Saltwater

[Antrias]

Got the leak in the overflow fixed and the tank filled with water again. Got the DCS-170 ordered, sand and rocks coming to fill the tank up

http://imgur.com/Urgz1Ue

only problem is the overflow is super loud - on my small tank to quiet it up i just used a simple ball valve but it's not working so good on this setup and the slip/slip setup the previous owner was using leaks and constantly drips water at the joints

http://imgur.com/LXpLG4O

I'm not sure what the best way to go from here is - the stand pipes in both overflows are different sizes and they are siliconed into the bulkhead it looks like and the bulkheads are also silconed to the glass

Should i replumb the setup and throw in new bulkheads / standpipes with two separate drains going into the sump or make minor adjustments to what i have?