I have a 180g, 120g, 75g, 40, 30g & 3 20gallon tanks. I put water into 42 gallon rubbermaid cans, 2 of them, airate & heat with a regular tank heater overnight and use a water pump that does 2800 lph to fill from the cans. I have a spray bar on the out take of the water pump so I just sit back...