thanks for the comments obsstar. i was planning on using 100% perlite as well. i will most likely be growing just one plant at a time so i will not be using a separate res or timer for feeding. i'll just be feeding the old fashioned way.
you're welcome and nice!
what do you mean by the following comment "most people run their perlite or hydroton hempy bucket water systems for 15 to 30 minutes every six hours (four times a day)"
i'm assuming you mean that your air pump turns on in your res/control bucket at these times. is this correct? i've never actually read about using an air pump for hempy buckets. i do have one that i used for my DWC though so i could add it in.
most res/control buckets have a submersible water pump in them that pumps the water to the individual plant sites/buckets (there's actually even more complicated setups with multiple water pumps sucking water back to the res and/or circulating water in the res, but no need to go into that)
using a control bucket makes things a lot easier, even if you only have one plant/bucket
with a separate control bucket, you can fill it up with however much water you want, set the timer and let it go, refilling it with water when needed
in my setup so far i have not needed to refill it throughout the week, but i have not yet gotten into flowering (i just switched to this type of system), let alone late flowering
i'm pretty sure in late flower both girls will drink between a gallon to two gallons a day
i swap out the res/control bucket water every week, just to keep things clean (treat it exactly like dwc)
and yeah, a separate control bucket makes water changes SO much easier than dwc (if you did not have a separate control bucket for dwc like i did not, you know what i mean)
a separate control bucket also allows you to make water changes while it's lights off
also, like you said, you don't have to move the individual plant buckets around so you can do scrog
that's actually the same reason why i switched....i really wanted to do scrog again (did it in the past with soil with awesome results)
watering in perlite.....
most people run their water pump in the res, pumping water to the plant, for 15 to 30 minutes, every 6 hours (which means 4 times a day it runs for 15 to 30 minutes)
they say not to run it more than that because you will drown or overwater the plants
this is because the roots are not getting any oxygen
i have seemingly solved this issue by putting airstones in my res, to saturate the water with oxygen, exactly like in dwc
i got the idea from doing dwc in the past and being well acquainted with dwc
i don't know if there are any downsides to running the water pump 24/7 like i am, other than overwatering which i have taken care of.........the only other thing i can think of is extra wear on the water pump, and possibly having the water pump burn out faster than traditional systems
also, watering by hand may be very hard to do with pure perlite
i don't know if coco holds water better, but with pure perlite
you will want to water every 6 hours at a minimum
and use your dwc/hydro nute schedule because again, there's no nutes in perlite for the plant to absorb like with soil
Edited by obsstar, 08 August 2012 - 06:54 PM.