游水要買既野

你可以去西九龍中心的先施(而家好似有特價), 可以一次過買齊要的東西, 而且品質有保証.
泳衣
泳鏡
泳帽
吸水毛巾
耳塞
拖鞋

泳鏡、泳衣、泳帽

小型沐浴露、洗頭水

you have to buy a pair of goggles, a swimming suit(one piece is better).
you have to buy an anti-fog cream to put on your goggles(about 50, you can buy it in Sogo 3floor.)
you won't get water into you ears if you are careful.Actually you don't need anything for avoiding water going into your ears.
you have to buy a pair of slippers too because the floor of a swimming pool may be dirty.(you can just buy them in the market,about $10.)
you can buy all the equipments in sogo,for about $400

Good luck!