I have duck weed on some of my tanks, i think I spread it with my net or water jug. it does not seem to survive in some of my tanks and I think the fish eat it. where it grows I skim most off when I water change.
not sure what a 'wet and dry trickle filter ' is but I keep water surface agitated with filter return or air stone or venturi.
not sure what a 'wet and dry trickle filter ' is but I keep water surface agitated with filter return or air stone or venturi.