reseal yourself its not that hard. Remove the old silicone, clean well, prepare the surfaces with acetone or isopropyl alcohol and reseal with GE silicon 1 doors and window. I would think taking the tank somewhere to get resealed would be a pain in the arse.
I agree...you'll just spend more money paying someone else to do it that can easily be done by yourself.
If you do decide to reseal it yourself, DO SO IN A WELL VENTILATED AREA...or wear a facemask and some safety glasses lol. The stuff STINKS! Last time I resealed a tank it made my eyes water and I could barely breath (I know..dumb on my part..I learned from it though)
Also make sure it is nontoxic...I would also wait 3 days for it to dry after you resealed it...the extra time will give the sealant extra strength