Wow, 95% is extremely high. Is it that rate throughout the house? Mold may become an issue for you. You should try a top on the tank for a day or two to see if the source is just the aquarium. Putting plastic on just one window will give you a good test.
I have window sweating issues in my apartment when I do a lot of cooking. I'm on the 22nd floor right by the lake and my windows are ancient 1/8" single pane glass with aluminum frames... not that I'm bragging
