"He wore his heart outside his chest and would never think twice about helping anybody whether you were a friend or a random.
"I am simply trying to raise some funds to help Pua's family through this very tough time and to get some funds together for his super-talented amazing daughter Jazzy's future."
So far more than $3,900 has been raised by 82 generous donors. Funds will go into the bank account of Pua's twin brother Tanu.
The body of the 38-year-old was found in Wellington on Saturday morning.
Police confirmed they were called to a sudden death at an address in the Wellington central business district in the early hours of Saturday.
In a statement provided to the Herald, a spokesperson for the late actor's family - including Tanu and actor brother Robbie - thanked the public for their love and support.
"Pua's family members are in the acute stage of grief and are not in a place to comment at this time other than to acknowledge the public outpouring of love for Pua and to thank all those who've expressed their condolences and offered their support," the statement said.
Magasiva, who has a young daughter from his first marriage, married wife Lizz Sadler in April last year, 18 months after meeting on Instagram. Sadler also has a daughter from a previous relationship.
Magasiva and Sadler travelled to Bali last month to celebrate their first wedding anniversary.
The actor rose to fame on Shortland Street where he played nurse Vinnie Kruse-Miller from 2003-2006, and then returned from 2011-2018.
Magasiva also had roles in the Power Rangers television series, Sione's Wedding and Outrageous Fortune.
He co-hosted the breakfast show on Flava, a radio station owned by NZME, but left the show last year.