Why not just get a larger tank: what if I want to develop 5 films at once? 5-liter tank is not a common accessory. About time: I always do testing before processing important films, thus no problem with trial and error. I actually ask about any extra consideration I can be not aware of. For example: can it affect fog level? – When I drain the first "half- bath" I remove also the reacted development products that slow down the development, so the second half bath can be more efficient. I don't know how it can affect the fog. Etc etc. In any case I will make tests. If there are no special warnings, please take it easy, i.e. ignore my question. In any case my thanks to Pete and Scott.(posted 8335 days ago)