ok guys back again doing it big 1 more time... well the tank is 300gallon and the grow bed is 4x8x 14deep, i am sure i will be adding another grow bed same size and maybe a blue 55gallon drum cut in half which i do have already.. but first we will see how everything goes... its a bit taller than i wanted but i will work with it for now.. i might need a step ladder.. ha ha will be back with more pics...