It is Kent's iron and manganese plant food. My 10 gal has two anubias, one wrendt?, and another I've forgotten the name of but send delicate 1" leaves to the surface. The 29 gal has 1 amazon sword, 3 or 4 white ribbons, 3 or 4 Kyoto grass. Will be looking to add some more top the 29 gal.

Good luck. I'll watch for responses to your querry. Hope someone has some answers for you.