SuperColey1 uses superglue to attach java fern to wood. Depending on the glue used, I think it is safe. There is a thread about it, let me dig around.
Found it.
http/www.fishforums.net/index.php?showtopic=291665&view=&hl=Superglue&fromsearch=1
llj
Found it.
http/www.fishforums.net/index.php?showtopic=291665&view=&hl=Superglue&fromsearch=1
llj