reef octopus classic 110int

I’m starting my Red Sea Reefer 170 build shortly. I just ordered my Reefer 170 and I do not have it yet. This will be my 2nd setup. My first tank I set up a little less than 2 years ago, it was a 75 gallon setup with a 30 gallon sump. I then added a 40 breeder to the system about a year ago...