What are the waterproof practices of the pool? What is bentonite?
You don't understand what is now the pool structure, I estimated concentration, first, estimated to be reinforced concrete reinforcement within your width is too small, resulting in temperature stress exceeds the tensile strength of concrete reinforcement, cracks, obvious first, or reinforced, not in the pool wall and the floor is arranged between the reinforcement and reinforcement or not, is not reinforced concrete haunch angle, resulting in the sensitive parts by water pressure arising from major cracks.
Good repair techniques: water, water drained, the cement base polyurethane coating in the whole inside and outside is coated with a layer of film, stay dry, this coating is mixed with cement mortar, plaster for re stratification.
Since the pool has leaked, you can not say "want to use rigid waterproof treatment", should be "rigid pool leakage, I want to repair."".
Rigid water pool refers to the pool, pool wall, pool floor all adopt reinforced concrete structure, and with waterproof agent, as well as waterproof mortar.
