Elli: I saw a beautiful fish in the market the other day, it was orange and blue. I'm thinking of buying some next Sunday.
Phaidra: Where would you keep them?
Elli: In that round bottle over there.
Phaidra: It's a bit small, isn't it?
Elli: So are the fish.
Phaidra: I think you should get a tank if you want to keep fish.
Elli: Really?
Phaidra: Yes, you should never keep fish in a small round bottle. They don't get enough air. I suggest we go shopping together and look for a nice tank.
Elli: That might be quite expensive.
Phaidra: Check the prices before you buy one and you ought to put a few large rocks in the tank. Fish love swimming around the rocks and through holes in them.
Elli: Is there anything else that I ought to get?
Phaidra: Yes, you need to get some underwater plants, for one thing they keep the water clean, also they make the tank look much prettier.
Phaidra tells Elli things that should be prepared for keeping fish, including a tank, some rocks, and underwater plants.