dericcanderson
In Memoriam
Agreed, from the pictures it looks like at most there might be 5 gallons of overflow room in the sump. Calculated out that means if the main tank drops anymore than 1/2" when power goes out the sump is going to be running over.
Ok, from this post it sounds like you're going to be adding fish right away. You need to slow way way WAY down. Not only do these DIY rocks need to cure for a couple months or sometimes even longer (and that is in a separate container that you can regularly change all the water in), dumping some magic chemicals in the water is not going to make it ready for any fish "soon". You'll need to wait a month or perhaps even longer for the tank to cycle and stabilize.
Here is a really good post on everything that is required with DIY rocks. Its not as simple as molding a bunch of rocks, waiting a few hours for the concrete to dry and throwing them in the tank.
http://reefcentral.com/forums/showpost.php?p=11531293&postcount=12
Check online buddy I went to my LFS There is some new stuff out that cycles tanks in a week. This isnt my frist tank my friend i have had plenty everything will cycle well and i simulated a power outage at worst i may have a gallon or two on the floor i cut the pvs on my return to sit almost at the very top of the water so once it drains down i will be a ok