I recommend reading through several of the DIY builds before you begin. The key is to have a good plan. I have a 315G tank with a dual sump that is up and running without any issues. I used Liquid Rubber to seal my tank and it is a product I would recommend and use again. I have heard of wetsuit but have not seen any builds where it has been used. Unitl that happens, I'd stay away from it unless you have the money to be the firrst possible fail. The thread to my build it located below, if I can help with anything send me a PM....I dont get here very often these day. Good Luck!