2 x 75gal tanks
I am a newbie here. I was handed down 2 empty tanks by a relative who doesnt keep fish anymore. There is also this 1.5 feet long sump filter that went with it, with disorganized contents in the inside. Idk if I should use that filter or an existing pond canister filter with 8000 liters per hour capacity. What fish do you guys recommend? Also I was told that without the proper chemicals, must let the water settle for a few days before adding fish?