Need info on some Tetra's products


I like to find out if anyone have good or bad experience with
Tetra Hilena Crypt fertilizer, its composition etc. Also can
Tetra pH Marine use for freshwater? It has a range of 6-9
instead of 5-10 on their freshwater version.

OK, one more question. What do I feed Flying Fox? It is not
eating algae but went for some of my very delicate plants.

Thanks in advance. rgds..kbkoh