Question

[Tim]

Is Maracyn and Maracyn 2 safe for plants?

[Mettle]

I've never seen had an issue - but I don't know for sure.

I think Maracyn can kill off certain types of 'bacterial algaes'. But I'm just pulling at straws here.

[BigDaddy]

Perfectly safe on plants.  Have used it in the past in a planted tank with no ill effects.