well i jsut boguht the 6212 wavebox for a upcomming 320g build, but i couldn't resist but to try it out on my 75g qt tank. The tank is empty wiht no rocks and i took out all the power heads. The water level is up to the line on the wavebox (tried different water levels as well)and about 2-3inches from the rim of the tank. I read a couple of threads already and installed those screws on the back but i'm not getting huge waves in a 75g tank? jsut giving me doubts on how it would hold up in my 320g. I tried the tweaking method but the most i can get is about a wave less than an inch which is also not even consistent. been playing wiht it for a ocuple of hours please help!! is the wavebox too much for the 75g? could my wavebox be faulty? please help me thanks!!