Hi, goodbb,
I dont know the bath tube is the same one used in Huaxia. But I know it is very popular in China cause some people even throw the babies into tube when they are couple days old. I believe most of babies like water if only you catch the right timing.
I noticed my baby will really love it if the water is not too cold and she has had at lease one hour nap and milk. I think it is difficult to catch this timing if we do it outside.
However, swimming in the public pool has two other problems. 1 is swimming diaper. it is very expensive. each costs more then S$1, and probably baby can only swim 10-15mins. so I reuse them if only my baby didnt peel or poo. 2 is other kids. They will splash the water or swim without eyes(^-^), so I always stay with my gal in case anyone will hit her.
The whole set only worth less than 30S$, and I bought float alone about 6S$.