Aw Geez, I feel for ya. Lots of people have already posted on what to do for your fish and how to deal with that part, even if it stinks it really is true. That said, I'm betting that your sister isn't just giving you a problem with the fish. I'm the oldest of three and both my little brothers and my younger sister drove me NUTS!
So many times when I tried to point things out about my sibs to my parents and get them to see what I was talking about they just told me to 'deal' and nothing got any better - that is the sibs were still messing with my space and my stuff.
This might be a chance to show your parents that things are a bit of a problem, trust me, as a mom now it's a whole lot easier to tell kids they gotta deal with it equally when it's just the bickering and arguing, but if you go to your folks with this in a calm way, and can actually show them 1) the issue/problem and 2) that you are dealing with it responsibly and fixing it (be extra careful with it and take all of the time to do it right and keep checking it) and let them SEE how much effort you go through to fix the problem (just don't whine). Add all of these things together and most parents will see that there really is a bigger issue going on here.
The thing is your issue with your sister is one part, her getting in your stuff is another part, but HOW you deal with it will be the biggest part in your parents eyes.
Truth be told this could be a great chance for you to make some headway, she gave an example of her behavior (not so good on multiple levels) now is the chance for you to give an example of yours.
Just some thoughts and ideas from someone who has been both the kid and the parent. Good Luck.
So many times when I tried to point things out about my sibs to my parents and get them to see what I was talking about they just told me to 'deal' and nothing got any better - that is the sibs were still messing with my space and my stuff.
This might be a chance to show your parents that things are a bit of a problem, trust me, as a mom now it's a whole lot easier to tell kids they gotta deal with it equally when it's just the bickering and arguing, but if you go to your folks with this in a calm way, and can actually show them 1) the issue/problem and 2) that you are dealing with it responsibly and fixing it (be extra careful with it and take all of the time to do it right and keep checking it) and let them SEE how much effort you go through to fix the problem (just don't whine). Add all of these things together and most parents will see that there really is a bigger issue going on here.
The thing is your issue with your sister is one part, her getting in your stuff is another part, but HOW you deal with it will be the biggest part in your parents eyes.
Truth be told this could be a great chance for you to make some headway, she gave an example of her behavior (not so good on multiple levels) now is the chance for you to give an example of yours.
Just some thoughts and ideas from someone who has been both the kid and the parent. Good Luck.