Norman Hermitage was taken to the home in Firle Road in January 2006 and was not expected to live for more than a few weeks.
But despite his ill health he remained a resident there until he died in November last year.
An inquest heard that the 82-year-old had Parkinson's Disease and was fed through a Percutaneous Endoscopic Gastrostomy (PEG) tube because he had difficulty swallowing.
On the morning of his death on November 18 a male nurse had been with Mr Hermitage.
He left the room and on his return 15 minutes later realised that the retired police officer had passed away.
Mr Hermitage, who had in the past suffered a heart attack, had suffered no pain from the PEG but a member of staff had concerns over whether it needed changing and felt this should have been done during a previous hospital visit.
A statement read on behalf of his daughter Jackie Arkwell said that the home was superb following his death and praised the care they gave him.
District nurse Judith Ball from the Seaford Health Centre told the inquest that she had visited the home in September last year for a general study day about tube feeds and had been informed about a problem with over-granulation of Mr Hermitage's PEG.
She later treated the area with silver nitrate and told the inquest the member of staff she spoke to was happy to continue treatment if necessary.
Mr Heritage had had the PEG for two-and-a-half years and his GP Sarah Steward from the Seaford Medical Centre was asked by Coroner Alan Craze if she thought that it should have been changed in this period.
She told the inquest that she knew patients who had not had it changed in a shorter period of time than this and that reasons for changing a PEG would be if there were fluid problems.
Notes from pathologist Dr Jane Mercer, who carried out a post mortem examination, said the edge of the disc (of part of the tube) had been pressing on Mr Hermitage's stomach wall which had appeared to have caused an ulcer and then led to peritonitis.
Mr Craze recorded a verdict of death from natural causes.