Nutrient Questions?!?

Hey my plants are almost a week old and are looknig pretty healthy. Im wondering when do i use nutrients? And how much for how long? The resevoir im using is 5 Gal and im using SensiGrow A&B nutrients. The chart on the back of the bottle is very little help. Anyone with info will help out alot.

yeah man......2tsp per gallon is plennnnnty. i started with the same nutes. as long as they're germinated with a couple leaves you can start. i feed 3 times then just a water feed with a little "superthrive" added. feed 3 more times then water....keeps the salts from building up. the advanced nutes bring the ph down naturally but you'll wanna make sure its around 5.5-6. depending on your strain i only veg till about 9-12" tall, otherwise gets too big in flower. just so you know, i know the advanced nutes are expensive. i've gone with miracle grow or shultz my last 3 grows and there is no difference.

alright thanks for the help