Coroner Dr Wallace Bain heard evidence from Rotorua police, Prem, Ms Sharma, an Australian colleague of Kesho, a pathologist, a forensic scientist and a Rotorua Lakes Council officer.
Dr Bain reserved his decision until after November 27 but said his preliminary view was there were a number of different possibilities that could have contributed to Kesho's death.
They were a possible heart condition (arrhythmia), dizziness or fainting, or the presence of hydrogen sulphide in and around the pool.
However, Dr Bain said motelier Prem had followed best practice with the use of his hot pools and commended the council for its geothermal pool testing and monitoring regime.
Pathologist Dr Tim Sutton said the ultimate cause of death was "most likely" drowning.
Both Dr Sutton and forensic scientist Dr Helen Poulsen said it was unlikely Kesho had been exposed to a lethal dose of hydrogen sulphide.
Prem told the court he had heard Kesho meditating and reciting Hindu mantras in one of his hot pools shortly before his death. Kesho was in Rotorua speaking to fellow Hindus about his faith.
After receiving a phone call from Ms Sharma around 2pm, Prem went to check on his friend.
After knocking on the hot pool door and receiving no reply Prem broke the door down, which was locked from the inside, to find his friend face down in the pool.
He said he and his wife took Kesho from the pool and along with his daughter started performing CPR.
About 10 minutes later an ambulance arrived but Kesho was dead.
Kesho's daughter said her father was teetotal, a strict vegetarian and fit and active for his age.
She told the Rotorua Daily Post she thought there should be better advertising of the risks of bathing alone in geothermal pools for tourists to the city.
She said she held no animosity toward Prem but wanted to place some accountability on those who enforced bylaws regarding geothermal hot pools.
