Im planning on building a blind for my boat and trying to figure out what i need. Im planning on using bimini top fittings but i dont know what size conduit would be best. I was planning on using 3/4 inch but i dont know if it will be strong enough. I will be spanning about 12 ft and i dont want it to be to flimsy. Will 3/4 inch work or do i need to go ahead and use 1 inch?

Read this thread. All you need to know is in there.
viewtopic.php?f=4&t=3347

For the record, I built mine and my brothers according to that thread. Once the splice is welded like poker explains, it's not flimsy. Mine was really a mix of the 2 in that thread.