Fill & Go containers are a great way to carry your RO water or RO Salt mix for top ups. Or mix your own salt in with the RO water. Great for tropical aquariums that benefit from the addition of RO water but you don't want your own RO unit. Top up or emergency water always available.H2 Fill & Go 20 litre Folded 260 x 260 x 70mm Full 290 x 290 x 335mm