Thanks. Really, you've helped so much.~
Sometimes things happen that's out of our control in the fish hobby. I've personally lost a few fish myself .
F FirstTimeFisher .. we are sorry for your loss.. its always heart-breaking to loose a pet...
astlindsey said, its happened to most of us somewhere along the line.
Going forward try convince Dad to get a bigger tank if he replaces the arowana, it will make everything much easier and safer
A small tank is much, much more difficult to control the water and it can test fine now and go pear shaped in a few hours without you realizing.
Keep your chin up....
I personally would not replace the arowana in that size tank, because its just too small for an arowana.
And a 30% water change is not a lot, I do 30%-40% water changes on my tanks every other day. Unless you didn't use a dechlorinator?
What were you feeding the arowana, was it feeder fish from a pet store?
If so, a parasite/bacteria from a feeder would have been my first thought for a reason it died, since water quality seemed proper. And the feeder could have been fed a month ago, or more, but took a certain incubation period for the disease to manifest itself.
Or it could have been a parasite within a fillet or shrimp from the grocery store if fed raw.
Unless it was sushi grade, store bought fillets and shellfish are meant to be cooked for human consumption, to remove pathogenic bacteria, or any other phage.
Some of those same pathogens will also kill aquarium fish.
Hello; As has already been mentioned this is a risky thing to do. Even fresh filets from the grocery store are a risk. May I suggest trying to get tank raised fish raised on pellets or other non-live foods. If you must get wild caught try to find those that have already been weened off live foods.feeding feeders. Goldfish mainly. From Petco
Hello; Quite a few folks have been in the position you faced. In that a fish that needs a large tank is bought before the large tank. The idea is they will eventually get the big tank. In the meantime the fish get too big for the small tank. May I suggest getting the big tank first and then the fish later.getting a bigger tank and moving soon
Hello; As has already been mentioned this is a risky thing to do. Even fresh filets from the grocery store are a risk. May I suggest trying to get tank raised fish raised on pellets or other non-live foods. If you must get wild caught try to find those that have already been weened off live foods.
Hello; Quite a few folks have been in the position you faced. In that a fish that needs a large tank is bought before the large tank. The idea is they will eventually get the big tank. In the meantime the fish get too big for the small tank. May I suggest getting the big tank first and then the fish later.
I gather you father has something to do with the fish and the decisions, so some of this may be out of your hands. If this is the case now and was the case when the arawana was purchased it is my take you should not feel like losing that fish is something you did wrong.
That fish was too much for a 55 gallon all by itself. The feeders represent a lot of protein and two a day is a lot for a 55 gallon. The two fish in that tank with the feeding make what I sometimes think of as a "tightrope" tank. By that I mean the balance between decent water quality and the water getting "bad" is very delicate and can go bad quickly.
You likely did well to keep that setup going for a time.
Anyway as sad as it is to lose our fish it is a part of the hobby. Hope you feel better.