Don, your story is very similar to mine except I can't fit the 40 watt Lifegard under my 750XXL so I bought the Coralife TurboTwist (36 watts). Still haven't figured out the best way to plumb it in. Just filled the tank for the first time this weekend and have the water circulating through a Sicce Syncra SDC 7.o return pump. Trying to figure out how to adjust the levels properly. Like yourself, I ran a 40 watt Lifeguard in my first tank many moons ago and my water was always crystal clear and I suffered nearly zero losses once everything was stable. With my new750XXL I also need to plumb in a PhosBan reactor which I feel contributed to my success the first time around. If you have any thoughts or suggestions on how to plumb both of these into the 750XXL, I would appreciate to hear them! Good luck with this gorgeous tank!
Thanks,
Ed