Cleaning green mould stains off decking

[JHONE]

My decking has gone greenish through the winter and I was wondering how to remove it - what should I use to clean it off, and would bleach be too harsh. It was put down late last summer and we didn't treat it so now it needs doing.
Many thanks

[dilligaf]

Just did my decking with a powerwash (no chemicals)
Came up like new.

[malpal]

Jeyes fluid is great for this type of job.

[Alibobs]

I've just pressure washed mine - my back's aching but it looks great!