A little update here.
My tanks are still sitting in my sun room and rocks are still curing. It's taking a long time because I have been running around to get my old house on the market. My realtor is such a task master and keeping me very busy unfortunately.
My rocks outside were doing very well until I left for Florida for conference. When I came back after four days, some rocks were turning dark green. No hair algae but some spots, where sunshine was hitting, were very green. This may be a sign that cycling is almost done. However, I decided to cook/clean up the rocks via Dr. Randy's method since I did not want to start an algae garden. I know it's rather drastic, but this way, it's like starting with dry rocks. There were still a lot of sponges hanging on the rocks to my surprise.
I also tried to clean up the bottoms of the corner overflow boxes where a rubber gasket meets the glass under the bulkhead fitting. I was amazed to find a very thick mat of dry crud at the bottom. It was like an inch thick and gray. If felt almost like paper mache. Since they were soft and crumbly, I broke them up and scraped them out with my fingers.
Then I cleaned the thread of one of the bulkhead fittings with vinegar. The nut on it was so hard to unscrew when I took the tank apart, but after cleaning it with vinegar, the nut screwed on (and off) very easily. I am going to soak the remaining bulkhead fittings in vinegar along with Durso pipes since they are stuck and I cannot get them apart. I hope they will come apart after soaking, but if not, I suppose I will simply put them back into the overflow the way it is.
Is there anything that I should do before I put the pipes back together?
It was so hard to take the bulkhead fittings and flex hoses apart when I moved the tank. I am dreading that the tank won't come back together easily. It's silly to feel this way, but the task feels daunting... I am hoping and praying that I can put the tank back together without a problem or a leak. Please keep your fingers crossed for me.