YOU SAID:

I need some water or else my fish will explode

INTO JAPANESE

水が必要です。そうしないと魚が爆発します

BACK INTO ENGLISH

I need water. Otherwise the fish will explode

INTO JAPANESE

私は水を必要とします。そうでなければ魚は爆発します

BACK INTO ENGLISH

I need water. Otherwise the fish will explode