i would like a big tank maybe 400 or so. dont really want to make it ,but i may have to any ideas on where to buy. it would be put in a wall so one side of glass is all i need.
I would think your best bet for something like that is to look locally for a company that can install it for you. Otherwise you are going to have to get the glass sheet and design a tank for your wall yourself.
You are in New Jersey, right? I see a lot of aquarium companies advertised on the web that serve that area, just do a google search.
remember you are not likely to find a retail store to stock a tank much larger than 125~250, we have a few that stock 200s & 300s.
custom fabrication or a reseller that will order & deliver for you also offers a bit of delivery protection; cause you dont own it till its delivered, & if there is damage in delivery, then the company insurance should cover it