My cover would only be half as dense as that, should I consider more plants?As long as your guppies are wet, you will have fry. At around 3 cm, you have very young fish so it may take a while before the first drop. After that one, about every 4 weeks you should see a new drop. I just dump my guppies into a group setting with good cover and get this result. Note that I do have heavy cover in the form of java moss in that tank. Guppies make rabbit populations look downright sluggish.