Not certain about this but I believe you will have to achieve 1500 hours fixed wing, to include a specified amount of time 'In Command' (which you may have, think it is about 250 hours), about 100 hours night flying fixed wing, a current IR and so on. As you are probably looking at an FO slot with the airlines you really don't have a problem yet as by the time you need your ATPL for a command you will probably have more than enough FW hours.