Wnna go and give swimming trial for selection (haha). They will first ask you, do you have district level certificate [this special requirement is for special people like us (pun intended) ]
Well, there are two pools in this area. As far as I know only BHU students, staff or their wards are allowed to take admissions here for swimming. Personally, I think the pool for beginners is quite clean, the changing room facility is awesome, a bit packed though.
Being inside BHU (banaras hindu university) this place is not for general public. Its for students and university staff. However they organise summer camps where General public can participate after registration. The place is great with big swimming pool. There are actually 2 swimming pools adjacent. One for childrens other for adults. BHU sports board used to organise many competition including state level championships there. Some of the government organizations use the pool for their annual competition. You can find More information about events from Sport Board BHU.