Thanks Joe, that's kinda been my method so far (over build) and the tank is very heavy because of it lol. The front with the glass window is going to bolt on to the rest of the tank once its moved down to the basement,no way ill lift it all bolted together ,then ill just have to seal the seams with the liquid rubber.I think I'm going to fibre glass the window area because silicone won't stick to the zavlar. I do have another question as well, if anyone knows please let me know. I am going to use a pressurized pond filter but would like to also use an external bio filter and was wondering how or if it would work to suck out of the aquarium through the external then into the pressurized and back into the aquarium. I want to do this because she is a very large lizard and will get even bigger (4-5 ft) and she has gigantic craps lol. Thanks for the help.