TheCanuck;3830807; said:aaahh i see but still why not go for the nice clean surface skim? Guess im just a SW geek and thats how i do it.
Think it's a personal preference thing what level people like their water drawn from their tank to their filter. For example i prefer my intakes to be as close to the bottom as possible. With a bit of work it could be possible to have mutliple bulk head levels feeding down to the sump and have equal flow through all of them if you're that paranoid about drawing water from all levels of the tank. I was working on a design in my head, never drew it up unfortunately but was using a similar arc up design like the OP's illustrated.
The design will work as long as, as the OP says, he remembers to put a breather at the top of the arc to stop syphoning.
