well, pretty impressive. I hope i can take on something like that for myself one day. I am concerned for your floor tho. I have quite a bit of experience there, and granted there are more products then any one man could ever learn, but i just cant imagine a water proof laminate. Its compiled sawdust, glued, and pressed together. It all interlocks the same....either way i think i would have gone one more step and put down a vapour barrier first. If that sub floor begins to wrought away at any point your going to have big problems. Im kind of confused why the 75 lb roller is there to, unless you glued everything down....
Sorry to sound negative, but ive sold and installed more of that product then most people will ever walk on and i personally really don't like it, especially in circumstances where is will be exposed to moister. All the best tho, i hope my worries for you is the biggest problem you have. How many tanks are you going to setup with all this new room?