Please do not place fish in the tank for about a week.
We need to wait until the water quality/temperature/pH is controlled/adjusted.
Tap water may not contain enough bacteria for the fish to survive.
Please do not place fish in the tank for about a week.(タンクには1週間ほど魚を入れないでください)
We need to wait until the water quality/temperature/pH is controlled/adjusted. (水質/温度/pHが調整されるまで待たなければなりません)
Tap water may not contain enough bacteria for the fish to survive.(水道水には魚が生きるのに十分なバクテリアが含まれていない可能性があります)
例文を挙げてみました。ご参考になれば幸いです。