Filling with fresh RO water, this is going to take forever. I didn't want to use tap water for fear of lingering phosphate that soaks into the foam. I was going to run it with the closed loop for a couple weeks and let everything leech out that needs to. While it's running, I'm going to get the sump and the rest of the plumbing going.
Next after that is the led's. I was going to do an 85 led's array but I'm going to put in 100 to start. There will be room for expansion if needed.