210 Gallon Goldfish Tank:
Tank Dimensions ( L X W X H): 84" X 24" 24"
Tank Capacity: 210 US Gallons (800 Liters approx).
Filtration: 2 X SunSun 304A @ 2000 L/h (each) + 1 X Internal Power Filter (Filled with Seachem Matrix) @ 1200 L/h + DIY Overhead Sump @2800 L/h + 4 X Large XY-380 Xinyou Sponge Filters (with 2 X Marina 200 Air Pumps).
Lighting: DIY LED Lighthoods.
Water Changes: 50% Weekly via Immersed Sobo WP 7200 (5500 L/h) Pump.
Here is the Sobo WP7200 Pump that is used for water changes, it's plumbed into the tank:
The pump is a beast! It takes around 7-8 minutes to empty the tank to 50% of the water level which is what I change per week. To fill that water back into the tank it takes an hour!
The entire water changing is seamless and doesn't involve any heavy manual tasks. I simply turn off the canister filters (leave the air pumps and sponge filters running inside the tank) and turn on the Sobo WP7200 submersed pump after I open the ball valve on it's plumbing. The pump's piping is plumbed straight from the tank down to my home's backyard drainage area 4 floors down. After the water level comes down to 50% I simple turn the pump off with the flick of a switch and shut the ball valve off to cut the siphon. The tank is connected to a hose which circles outside my house and directly links to a water outlet in my kitchen in the other wing of my house from which I can fill the tank up. The length of the hose is about 120 feet. Once done I turn all the filters back on again. Job done!
This 210 Gallon tank has been running for slightly over a month now and it's fully cycled. I have transferred all my existing Goldfish and filter media from my older 120 Gallon tank to it. New additional filter media was also added. The fish are really enjoying their new home and the additional space (specially the increase in length) has them nice and happy. They are presently all healthy and eating well. The 120 Gallon tank after serving for close to 10 years was finally shutdown last month.
I also have a shipment of K1 Kaldness coming in later this month from the US.