Hydroponic Watering?

I have a hydroponic set up... i think its called the drip system... and I was wondering how long and how many times a day I should keep the pump running? Or if I should leave it on all the time?

it really depends on the size of your pump, the size of your medium, the size of your drippers. But 4 times a day for 10 minutes works for a lot of set ups.