Need help with lowering ppm in flood and drain systems
- Thread starter Ddog_7965
- Start date
Thanks will tryv
Detroitwill
Well-Known Member
I mean, really? Geez
kingromano
Well-Known Member
i would never flood with pure water
you will shock the plants
you will shock the plants
HydroKid239
Well-Known Member
This is why my beans go in the dirt lol
rkymtnman
Well-Known Member
ridiculous.
thetruthoverlies
Well-Known Member
Fill your res with nutes at 600ppm.Flood for one hour. Check your ppm. Rinse. Repeat.
Flood and drain system, 15 mins every 3 hours for feeding, medium hydroton, 75 gallon reservoir, temp stays between 65-75, humidity 50%
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Star Dog
Well-Known Member
What ec do you begin with and how long does it take to get up to 2.2?
The pot size is relevant here, a smaller pot will return a higher ec for a given period, in that case you would want to feed more frequently so that the ec doesn't get a chance to rise.
It's perfectly normal to rise it depends on how quickly it's rising though ?
rkymtnman
Well-Known Member
i'd fix those plants quickly. they aren't gonna make it 3 more weeks. try about 490, not 1490
kingromano
Well-Known Member
what i find ridiculou is to excessively feed your plants and thus need to flush periodically with water
i feed between 2.5 to 3.0mS in bloom with rockwool setup, co2, hps
if i feed less plants become lighter green
the key is to give large runoff :every: feed, like 200% runoff
if you let salt accumulate/the EC climb in the medium, you will get nutrient toxicities/ bad taste on the final product
you can feed at 1.2mS and still get nutrient toxicities if you do not give enough drain .. no to mention your ph will not be controlled if you just pour new solution over the old one without draining=remplacing the old one with the new one)
flushing with water is a crutch for overfeeding
rkymtnman
Well-Known Member
what the f*ck are you talking about? how do you feed to runoff in flood and drain system? its a closed circuit system. flood/drain flood/drain flood/drain. dump your res and start again.
and i don't know if you noticed but OP's ppm was 2200ppm.
I know I was trying to avoid that nutes are expensive especially when everything is x75. I am not new at growing I started growing first in coco but nute regiment didnt allow for me to not hand water. Some the nectar for the gods nutes turn into bad bacteria after about 18 hours of sitting. So I switched to flood and train and its been a learning experience.
rkymtnman
Well-Known Member
your 1490ppm is still too high. like i said, try to get that down to 490ppm and see if they start eating.
i'm guessing that overfeeding has led to nutrient lockout. if you want them to live 3 more weeks, drop your ppms.
kingromano
Well-Known Member
salt accumulation are inevitable in flood and drain
as your medium dry out, even a bit, the salt are sucked to the top of the media
only way to counteract this is to add drippers to each pots in addition to the ebb flood system .. thats how dutch do it in warehouses
this way everytime you flood you also water from the top and rinse the nutrient accumulation ..
and yeah .. you read wrong what i said ..
you recover the runoff each time in a second reservoir .. then you adjust the ph/ec values and pour it again in the main reservoir to feed again
my AC's/dehueys condensates also flow in that 2nd reservoir ..
i run up to 3.0mS in bloom and get the cleanest ashes/end product
3.0mS=2100ppm, pretty close