I am about to reseal a 125 gallon tank I got for cheap but I haven't done one in probably 20 years. It's also much larger then anything I have ever resealed before. I have already picked up the sealant. I'm just a little apprehensive about it. Can everyone give me some tips and tricks before I start. Also can I leave it over night without being resealed. I worry about trying to rush and get it done in one evening.