So I also have two goldfish besides my betta, just the tiny carnival/pet shop variety about two inches long at most (the smaller one is very young and only about an inch long, slim as a stick). They are kept in a 5-gallon Fluval Chi (after going through a tiny 1-gal bowl- do not trust pet store employees- an Aqueon 5-gallon Mini Bow, and a 2.5-gallon Top Fin glass tank), and I am thinking about replacing it with a 16-gallon but I am not sure yet. The Chi filter recently broke and now we are using a Tetra Whisper 10i. However, we still have to do daily water changes, mainly because of how much goldfish poop (ammonia build up). Is this normal for goldfish? Does anyone have any ideas about keeping the ammonia down? I'm really sorry if Ive been a bad goldfishkeeper, but honestly I am pretty clueless.
Also, we are going on vacation soon for about a week, and I dont think that the fish can hold out long in a tank where the water needs to be changed daily. I know the old fish sitting stuff, but I dont think anyone really wants to care for the fish, and if they do I am worried they may end up hurting the fish, intentional or not. What can I do?