Now my final debate is the extra $100 for the larger size on my 120 + 40(ish) gal sump

http://www.reefsupplies.ca/online-st...nt-200gal.html

or

http://www.reefsupplies.ca/online-st...nt-125gal.html

More money than I wanted to spend on a skimmer but the specs on these diablo skimmer pumps are just amazing with the 900 l/h of air vs 520 l/h air - from what I understand more air the better + pinwheel gets a finer skim to the needlewheel

Got the 120G cleaned up and filled with water! But I have to empty it :( the overflow has a small leak in it so it doesn't stop overflowing and causes the sump to overflow when the pump is off :( so now I have to find the spot where it's leaking and fix it. :(

Go with the diablo you will not regrete the extra $100. As for the leak, fill the OF with water and see where it leaks out always works for me.

It was just the difference between two diablo models - i had reef octopus help me out because both descriptions said 300G tanks.

I found the leak it's at the bottom of the overflow :( time to take all the water out to fix it!

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?

Well after all the problems I finally have it all going!

The rock in the tank is just dry rock I got from reefsupplies.ca
http://i.imgur.com/4hVq1og.jpg

I had the wooden canopy made by Bill - Bills woodworking in Delburn it was a really good price. I had to do a little modification because I didn't plan light placement very well but the end result works good
http://i.imgur.com/lLcAsX8.jpg
http://i.imgur.com/78RFunr.jpg

My Reef Octo- DCs-170 and i re plumped the tank from what i had bought it as so that i could get it dead silent.
http://i.imgur.com/NieiRds.jpg