Tanks i made myself,first was 300gal ply 6"x2" frame,epoxy glassfiber lined and insulated,second 200gal ply 6"x1" frame, polyester glassfiber lined and insulated.The last tank that i have made is about 2200gal complete system just got it running before christmas,still have to plumb the heating system.Its made of concrete blocks with rebar polyester and glassfiber lined.Its a u shape looking from above,sitting in the middle there is a 6ft window to your left 5ft in front and 2ft to the right,its nearly 4ft deep,the back wall if straightened out would be about 28ft long.The 200 and 300gal are growing out some fish ,2xrtc,2xrtc shovelnose hybrids,giraffe ,marble cats these are 18"-24" also ,red pacu,giant red fin gouramy,silver aro,mad barbs hampala barbs,ripsaw cat,various sa ca cichlids.