Has anyone used  miracle grow 24-8-16 water soluble   in the system? Is it safe for the fish? Or is the waste from the fish tank enough fertilizer for the grow beds? I have 3 grow beds at roughly total 50 sq. ft and a tote with aprox 70 tilapia. Tilapia are doing great. I think my plants need some help. Lotsa plant, no veges. Peppers are falling of, cukes, lotsa flowers but no cukes etc..some tom…