My friend got a redcap oranda goldfish 2 months ago, and currently keeps him in a fishbowl with a plastic plant and an air stone. She changes the water every few days. I tested the water with api test strips and the nitrate & nitrate levels were so high they were literally off the charts. I explained to her why its wrong and even offered to rehome him to one of my tanks (a 10g with 3 balloon mollies and a pleco or a 4g that I've been preparing for a betta) but she just says that the guy in the store that has been keeping fish said it's ok, and claims that the fish looks happy and that its better for him in the bowl than in the tank in the store. She refuses to get a tank because she doesn't have space for it. How do I convince her to stop mistreating him? She just doesn't listen, and claims that the bad water results were because that time it was after a few days of not changing the water. Her parents are with her in the same opinion. How do I convince her? The fish isn't showing visible signs of sickness, he might be glass surfing but it might be just regular movements... help!