The tops of the thai onion plants have to be above the gravel and I was hoping to disguise them with my wonderful grassy riccia covered piece of slate . Will have to come up with another plan me thinks. Sand is a possibility but dont know if i can be bothered with all the hassle.Quite nice, I agree the riccia doesn't look to good, it's not very good in low light, that's why I don't use it. Also, I like your ?onion plants?, but I don't like the bottom of them. You should change your substrate to sand too, it would look much better IMHO.
Neal
Know anything else that looks similar but grows better in low light levels?