Hi, 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