Right... getting a new flat next month which is huge compared to this one... decided to go ahead with my plans for a brackish tank... I have an 80litre Sat round doing nothing currently so going to set it up. Filtration wise, what do I need? Stock wise I was thinking a breeding group of mollies and a puffer. Which one out of green spot and figure of eight can live in brackish all its life? What kind of salt do I need to use as well? And are there any brackish eels?