yea, well, water changes are gonna be something that i have a super streamlined process designed for, you see, above the big black 100 gallon sump tank, i'm gonna put up strong shelving, and on thoes shelves, are gonna be things like the fuge, the mangrove forrest, a salt mixing tank, and so on... also, in the bottom of the 100 gal tank there is a threaded bulkhead, so attached to that i have a valve, so, when i wanna take water out of the system, all i have to do is open that valve, (which for now will dump into a bucket that i can carry out, but in the future will have a drainline going out throught the wall) drain out some of the water in the system, while its still running, just watching the return pump section, then open a valve on the salt mixing tank up above and let in how ever much new saltwater i need. rinse, repeat.
oh, also, got the pressure lines plumbed in, and i'm now doing the first static water bulkhead leak test...