The lock from Gloucester has retired from rugby union after being diagnosed with a disease.
The man was diagnosed last week.
He played in three games for Gloucester last year.
The club said they were committed to supporting Ed and his family.
During his time at the club, he made 78 appearances in the top flight.
He captained the side for two seasons and played 136 times in seven years with the Tigers, where he won the title.
The forward began his career with Eastern Suburbs in Australia and went on to play in the English Championship.
He captained the England Saxons to victory over the Crusaders in New Zealand in the summer of 2014).
Nerves in the brain and spine are affected by the disease.
Former rugby league player Rob Burrow, Scotland rugby union lock Doddie Weir and ex-Liverpool right-back Stephen Darby have all been diagnosed with the disease in the last few years.
Gloucester appreciated the support they have already given.
The My Name'5 Doddie Foundation said it was aware of increased attention to head injuries and potential neurological disease, but that there was not enough definitive research to draw conclusions.
Any money raised on the page will be used to support Slater and his family and/or a charity that helps people with motor neurone disease.
Following his retirement, the scrum-half of the Rhinos was diagnosed with a motor neurone disease, and received an award for his services to the community.
Kevin Sinfield, his former team-mate and friend, received an Order of the British Empire (OBE) after raising millions of pounds for research into the condition.
A number of the clubs in the English language have sent their best wishes to the man.
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