timer
 

Dear Ron, I wish I had'nt come here cuz now am addicted ;^) I'm a Heating and Air Service Tech. and I think I can make a
"heat pump defrost timer" bring on a pump for 3 or 5 min. every 30, 45 or 90 min. Would this be better than the 30 on 30 off
timer? I've made the 11 bottle screw off garden and the cups will fill in 3 min. easy. I would use a air pump and stone to
areate the solution. Also any idea what the shelf life is of nutrient concentrate? I'm using "Green Air Products" Microbase and
Grow Nutrient#2 with Bloom Nutrient to come later. Ever hear of these? Last but not least, Thanks for this wonderful,
informative site, I've been here for weeks. I'll scan a cheap Poloroid and send if anything grows. Thanks, Jeff

The plants don't need to be watered for 30 minutes but that is the least amount of time on the inexpensive timers.
Don't know about shelve life but like everything else I would keep it in a cool dark place.
Ron