Just got this silver arowana 4 days ago. It's about 3'. It's been eating Tetramin Pro flakes along with about 5 baby crickets every 2 days. I made the mistake of adding it to my brand new 55 gallon tank not knowing about the cycle process. I've added a friends filter cartridge, along with Nutrafin Cycle yesterday. Today I noticed that it is swimming low in the tank, and also is turning a brownish color(compared to when I brought it home). I tested the water today and have 0 ammonia, 0 nitrates, 0 nitites and a ph of 6.0. Any feedback would be appreciated. Thank you.
P.S. not the best picture, but my camera broke and this was taken with my G1 phone.