Ok last post. My mom and I just went this afternoon to get the two new aros I don't think the tank had been cycles because I didn't know what it was at the time. This tank and it's equipment was given to is from a friend of my moms. I guess it was an old tank and they were getting rid of it, but anyways my mom took it and we started with a couple of goldfishes then it died rather quickly because of the missing heater then after that my mom decided to go for the silver arowana since it's good luck and all. The first cleaning process that we've ever done since the new aro was to take it out and put it aside the. Siphon most of the water out then taking the gravl out then scrubbing off the algae then putting back the gravel the new tap water. The aro seemed ok so we didn't think anything of it. But before when we had the goldfishes we did the same process the fishes got sick and white spots were appearing on the fish then it later died. So you see we had start with beginner fish but it's my moms doings.