Well after a hours and a half I got the old sealant removed and cleaned. I applied the new sealent and let it sit for 4 days to dry and then started the water test. I filled it to the top and it has been doing great. I will let it set with water for a month or better while I get a stand built, over low, pumps, pvc pipes,................... on and on and on and on and on. I have some time to let it test
On a good note the friend that gave me this tank gave me his custom DIY refuge. I will have to get a pict up for it. It will save me a LOT of time.