my silver arowana is very weak and can barely swim on its own.. the story goes like this.. this morning i took it out to clean my tank.. i put the fish in a bag full of water and then in to a bucket... i carried on to cleaning my tank then later on decided to buy 2 more arowana's i put the two new ones in and forgot about my silver arowana.... it was in the bag for about 4 or more hours.. i assumed the water got cold so the arowana started to get weak and turn upside down.. i put it back into the tank and it couldnt hold itself up..... now im afraid its going to die and i tried to keep it alive and breathing but it hasnt gotten better.. i tried moving it forward to recirculate the water through its gills.... but so far nothing is improving.... i really need advice and suggestions on keeping it alive and getting it back to its original healthy state....