The Aeroflo2 design systems can be running continuiously or placed on timers. The most popular way to set them up is with the 1 minute on 4 minutes off. Another way is run pump continiously until night cycle. Pump only needs to come on one time during a night (flower) cycle.
Another grower tells me that when he flowers he starts to slowly stress the plants. By this I mean he would go from 1-5 minutes on, 5 minutes off. Keep increasing the off times till you are up to around 20-30 minutes off. No longer then 30 minutes that is pushing it. If this is timed to be happening in conjunction with the end of flower cycle potency of the herb will be increased. I am not sure how much of an increase you can cause by water stressing your plants but it does work.
Some good advice with these systems is to NOT follow the advice in the intructions. It states that once the roots touch the bottom of chamber, push water level control tube to the bottom. I find that it is better to leave the control tube sticking up about 1/2-3/4" protruding up. This is a safety issue only, if by some fate of bad luck your pump dies, your plants will not follow suit
. This would leave just a small amount of water in each chamber. I almost lost my plants once, Future Gardens convinced me that it is the best safety advice you can get for this system.
Happy growing!