Almost the same tank
I have a 210 with the same configuration on the overflow. I had a snapper and when the bearings went I replaced it with a dart. I'm quite happy with the dart (noise and flow). As for the returns, I wanted to make sure I didn't flood the house and have the wife kill me. So -- I ran the 1.5" return over this side and around the top of the tank as the 2 3/4 returns will NOT be enough for a barracuda.
Then the 2 1" are a durso setup with the 3/4 setup as an "emergency" overflow line.
once I had it up and running I did a bit of testing. The 1" will handle more than 600 gph. In fact I plugged up the other bulkheads just t osee what would happen. As soon as the air hole on the top of the durso end up under water. The pipe goes into a full siphon and can handle almost all the flow of the dart.
The biggest problem that you will have is not the size of the bulkhead, but the amount of the opening in the overflow edge of the megaflow I had to open mine up a bit as if I open up the dart all the way, it almost flows over the top of the megaflow.
Overall -- The dart is enough flow and I don't run any powerheads or anything -- in fact my dart also runs my phosban and any everything else as well. I upgraded from a 90, and love the bigger tank. Of course this time I have a saltwater mixing tank, and plumbed a line directly to my drain for water changes. Buckets and 200+ gals of tank just don't mix in my books.
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