I have a 2-3 gallon plastic container... approx. 6-8 inches deep. I bought two bulbs from Home Depot... the kind come in a little pouch with "moss-like" substance in it. It's been over a month since I started. One bulb put on a leave but it promptly died. The other shows no sign of life. I even went to PetCo (or Petsmart) and bought 5 more bulbs... no sign of life from them either. I keep the water clean. Added algae-control drops. Have added Miracle Grow a couple of times. Still nothing. What am I doing wrong?