hey nanook did you try your t5000 as a single ever?,,, i have a second or 3500 and the shelf to mount it , just need to get the union fitting and the venturi and needle wheel for it… I've been debating if it is really that much better , my system is only 200 gallons. for a little under a hundred bucks i can turn mine into the dual pump.
I have not ran across very many people who run the big t5000's but it kicks the snot out of the a p851 it replaced with just the one pump.
bowed floor which life reef did you end up getting…. I'm sure you will love it, at one time i had all life reef setup sump, ca reactor, skimmer etc… now just a life reef sump. I wish i never sold the skimmer i think mine was like 4 feet high, fell into the needle wheel phase and should have stuck with tall skimmers…. post up how it does for you, I'm sure it will be solid