Who Gives A Fish Forums

Is the slime green or clear? Green could be algae, clear is probably biofilm. Either way, reducing light might help.

My tank's kinda low-tech, and my Java Fern is doing okay without extra ferts. But if you wanna see faster growth, yeah, a little bit helps. Just watch out for algae like goldfishy mentioned.

My guppies messed with my Hornwort at first, but it grows so fast it doesn't matter. Maybe try that? It's kinda bushy though, so if you want something neater, go with the Java Fern like goldfishy said.