Among his recommendations were that bathers should never swim alone, gas levels should be tested before every swim and water should be stirred to disperse toxic fumes.
The council said such suggestions would be hard to enforce.
Fleming said there were no warning signs around the pool where her father died.
"We were unaware of any dangers. There had been recommendations in the past for better safety around pools but it seems the lessons haven't been learned." Dorothy Binns said her husband was a fit and active retired accountant whose death had left a huge hole in the lives of their four daughters and 10 grandchildren.
The Nelson resident was "appalled" no one had apologised to her. She didn't want compensation but wanted someone to take responsbility for her husband's death.
"I would like future visitors to Rotorua to be safe and well-informed about the dangers. Just to hear something of a regret from Rotorua District Council would have been nice. But we haven't heard a word. It's really tough to take.
"They appeared to be more concerned with what was going to happen to the tourist trade than what happened to Phillip. I think they were too frightened to say anything in case it was an admission of guilt."
The owners of the Pinelands Motor Lodge and Fernleaf Motel declined to comment.
At least half of Rotorua's 80 motels have hot pools.
Bain said the inquest was of major importance to the city, which earned $454 million from three million visitors last year.
While council and motel operators ensured the pools were safe, present practice might not prevent further deaths, he said. "While thousands of bathers have no problem, there is still that wildcard factor."
The council is to meet motel owners this month to discuss the coroner's findings.
Regulatory and support service manager Jim Nicklin said rigorous testing procedures would be difficult to enforce.
"Operators would have to have somebody standing at the pool every time someone wanted to swim. That's fairly resource-hungry. I would say it is impractical."
Destination Rotorua Tourism general manager Don Gunn said motels had done a lot to improve signage around hot pools. "While these deaths were very unfortunate, it has to be put in context. We have millions of visitors to the city each year."
At least 10 deaths in New Zealand have been linked to hydrogen sulphide poisoning over the past 70 years, including artist Joanna Paul in 2003.
