Those sites are abot 50/50 fresh/marine.
Here's another marine...
http://www.nhaquariumsociety.com/Articles/marine.html
I purposely did this to show that the same thing is recommended for both freshwater AND marine.
A lot of people, including ones on this forum, use canisters and HOB filters for their marine set-ups so washing the media in old tank water would still apply. Any media, even bio-balls. A lot of people use Pro-clears where you insert the pads on top of one chooses. Same thing.
I still welcome any info you can provide that recommends rinsing in TAP water for a marine aquarium.

Here's another marine...
http://www.nhaquariumsociety.com/Articles/marine.html
I purposely did this to show that the same thing is recommended for both freshwater AND marine.
A lot of people, including ones on this forum, use canisters and HOB filters for their marine set-ups so washing the media in old tank water would still apply. Any media, even bio-balls. A lot of people use Pro-clears where you insert the pads on top of one chooses. Same thing.
I still welcome any info you can provide that recommends rinsing in TAP water for a marine aquarium.