you have nutrients an water that sit there at the bottom of the pot, which gets hit by light.. causing algae. Its ok, but it can attract other issues. Theres tons of stuff you an use to safely get rid of it.
you have nutrients an water that sit there at the bottom of the pot, which gets hit by light.. causing algae. Its ok, but it can attract other issues. Theres tons of stuff you an use to safely get rid of it.