chriscolt said:For a Sequence Barracuda (I have a 180 gallon reef tank and I am building almost exactly what you are showing here - GREAT DRAWINGS!!!) would I need to run 2" pipe for the drains (both only 1" bulkheads in Oceanic tank with 3/4" returns x 2) and returns? I was planning on 1 1/2 flex PVC for the returns and for the drains with a 2" Manifold or a 1 1/2" Manifold - the Barracuda has a 1 1/2 inch input and output. For both returns and drains my plan was to run only a single 1 1/2" Flex for each through the floor and then under the tank (in the stand) do a similar "T" for the returns downsizing to 3/4" at the bulkhead and a Waste "Y" connector at 1 1/2" with 1" drains at the bulkhead (using a reducer bushing) - so the only 2" pipe I would have (if at all) would be at the Manifold itself
When I upgrade from my current 70 gallon tank to the 180 - I was trying to figure out what to do with the 70 (48x18x21 H) - I have 2 Rubbermaid 100 gallon sumps - Is a 70 overkill for a refugium or a combo refugium / frag grow out? I also have ordered 38"x20"x6"H compartmentalized acrylic frag growout - it is shallow so I wouldn't need MH - these are built similar to a betta show tank.  Got them cheap not sure if it will work (have 2 new ones)
Chris