So I have a neighbor who I am housesitting for. Her betta is in a like half gallon bowl and the last few times i have come to house sit it has been in only like an inch of water. I always change its water and try to make it happier. I am really considering just taking it home and dividing one of my tanks until i can afford another one for it. I guess i would have to tell her it died but im not sure she would really even notice. This obviously is something that im not sure would be the right thing to do but its just my gut instinct. I suppose i could tell her to get a better tank, but I am somewhat shy and wouldnt want to come off rude to her or anything. what do you guys think i should do and if you think i should tell her to get a better tank w/ a heater , what would a polite way to do this be?