The slugs i would be concerned about, and i would remove them as quickly as possible. The worms on the otherhand, we need more details on what they look like.
If they are long, white, and look as if they are belly dancing from the soil are white or grindel worms. A common addition to an established tank. They are harmless.
M.N
If they are long, white, and look as if they are belly dancing from the soil are white or grindel worms. A common addition to an established tank. They are harmless.
M.N