Mad Lab
Member
Although some will suggest you don't need the covers because the algae itself will do very little harm to your roots, the reason most growers use covers are not so much for the algae itself.
Fungus gnats will lay eggs in your algae. So really your trying to avoid a gnat infestation here, especially near the coast or in wet areas such as Washington and Oregon.
Fungus gnats will lay eggs in your algae. So really your trying to avoid a gnat infestation here, especially near the coast or in wet areas such as Washington and Oregon.