I just started my freshwater converted 30 gal. over to salt after having both it and 75 gal. empty..new house and couldnt decide where wanted to put them. I started the 30 basically cuz cheaper. added 50 # live rock a week ago and new LED light that I love. going thru the cycling phase but excited to get back into it. once this tank going will be setting up the 75 gal saving up for LED's for it..