Finally I managed to clean the 3 footer tank. I used to have more fish but most of it was dead. They jumped out of the tank due to fear (my son whack the tank with his hand when i was not around). So now i only have 1 Discus and 2 Rummy nose in the tank. I also found the tank infested with snails, so will be getting some loaches to help control the snail population. Will add more Discus after my son grew tired to whacking the tank.
