I've been feeding brine shrimp to my new fish and his tank is just as murky as it can be. Do I feed too much? I've been trying frozen, but then I left the package out overnight and I was afraid of spoilage, so I dropped in a chunk of freeze-dried brine shrimp. The water just smells terrible...I did a 60% water change. The murkiness has gotten a little better...but the brine shrimp seem to be eluding me. Would a few large water changes make the water crystal clear again?