Please help setting a timer to run for under a minute

[rc1626]

I'm trying to set a timer on a socket to run for 30 seconds in GCC and it's not allowing me to do it. I'm trying to set up auto water changes using two separate pumps on two separate sockets. I want to run each pump for 30 seconds one minute apart. First pump is for waste water and second pump for new salt water. I'm setting it up on Timer 5 with start time being 10:00:00 PM and end time being 10:00:30 PM. When I try to save a box pops up saying my time is overlapping and the start and end time register as 10:00:00 PM. Sorry if I'm missing something obvious here but any help would be appreciated.
Thanks.

Edit: Although there is a spot for seconds it seems that you can't go with that finite of a time when setting up a timer. Hope that is not the case.

Edit Again: After a little research I found you have to go to switchmode menu and choose short.
Problem Solved