Suddenly forgot the finer points of Lomo developing

My Foma kit (1 Litre) will develop 30m of 16mm Foma film, but I have to split the film into two 50ft Lomo spirals. Hate doing this, get it slightly out and you have a massive tail wagging from one of the spirals. Just what you need in the darkroom.
Anyway, 1 litre of developer for one Lomo 50ft spiral. What about the other half? Is not the developer depleted over the first development, necessitating longer times for the second 50' please?

Or do you just pour everything back into the Jobo bottles ready for the next Lomo?
Thanks
