thats a beckett skimmer and you will need a large pressure pump to run it right. large pump= large electrical cost. (pump recommendations on this page
http://www.marinetechnical.com/page8.html) i had a large duel beckett and it worked well but was hard to dial in, needed a large watt pump, the injectors needed to be cleaned at least once a week and there was no guarantee that 5min after you just cleaned the injector a little speck of something wouldn't get in the injector and you would have to clean it all over again. ill never run a beckett again