a few months ago i bought a nice bunch of duckweed on ebay for a couple bucks. strange as everyone says its a nuisance and covers the whole top of the tank within a few days. me not so much. in fact its the opposite. i've almost lost all of it. its in a 10g tank with 5 platys, 5 ghost shrimp. i have quite a bit of baby java fern (30 plus leaves) and an anubias. its under twin 13 watt
cf lights with a internal whisper filter.
i haven't messed with ferts before because i a afraid of hurting the fish. it is my first go around with plants that haven't just immediately died. the other plants are all doing well but not the duckweed.
and also with the amount of plants i have in the tank which is i feel is quite a bit i am still having a freakin brown algae problem. in all my tanks actually. the 30 gallon does have some green growth but only on the hood and the 10g has some but only in the filter. i've never not been able to grow green algae ever. i got back into fish when i moved like 6 months ago and i did it for years before that and i can't even remember ever growing just brown algae