Does anyone know if these can be kept in an aquarium or are they poisonous to fish? They are normally grown on ponds as a floating plant but die in winter due to cold.
yeah ive got a 5ft metal halide unit with three 250w not sure on the colour temp but they are very blue so fairly high say 15000k and 4 t5 blue actinics all plants do well just before they get eaten lol