Confused about PPM. Please respond
- Thread starter IN33DW33D
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firsttimeARE
Well-Known Member
Hmmm, did you mix the res when it had flooded the plants and a lot of the water was still inside the media?
It makes no sense for it to have dropped that much, most of the time it rises because your plants are drinking the water and the water is evaporating thus making the other 999,400 part of that ppm figure decrease which in turn makes the nutrient ppm increase.
I'm only a beginner, but thats the only way it'd make sense is if some of the water was stuck in the media, and then now you measure most of its gone out of the media and diluting your solution further.
Or your meter is off? Still doesn't make sense that it read 600 yesterday and 300 today.
I know my res at 40 gallons i do about 500ppm and after some water is gone its up to like 550-600
It makes no sense for it to have dropped that much, most of the time it rises because your plants are drinking the water and the water is evaporating thus making the other 999,400 part of that ppm figure decrease which in turn makes the nutrient ppm increase.
I'm only a beginner, but thats the only way it'd make sense is if some of the water was stuck in the media, and then now you measure most of its gone out of the media and diluting your solution further.
Or your meter is off? Still doesn't make sense that it read 600 yesterday and 300 today.
I know my res at 40 gallons i do about 500ppm and after some water is gone its up to like 550-600
IN33DW33D
Active Member
Or maybe they are drinking the nutrients and not the water? I don't know all I did was dump enough water into the buckets to leave a lil space under the net pot. Then I just mixed a bunch of shit in there and yea, now I don't know what to do. Please respond.
Using t5 in the gro ton cubes or whatever and hydroton.
mufastaa
Active Member
I would bump it up to 800 and see if it goes down as much or if your plants have any signs of burn. I would say youre right and the plants are drinking more nutes than water at 600ppm. There should be a point when theyre absorbing the proportional amount of nutes to water and the ppm stays constant. And anyways ide rather be giving my plants more nutes if theyre hungry as long as you dont burn them.
IN33DW33D
Active Member
Im dumping 20ml of each in my 4 gallon buckets:calmag, botanicare aqua shield, some cns107 or something, and liquid karma. Ill check ppm again maybe bubbles are messing with me.
firsttimeARE
Well-Known Member
True...i just know in my system it always rises. And I figured they were 3 weeks old and 300ppm is a lot for them to eat in a day, how many you got? Never mind saw you posted it....how big is y our res?
Your plants did eat it all up as your using hydroton and that doesnt hold much water. grodan does though.
I'd add back nutes but make sure that you're not messing with the order they need to go in. Like im supposed to use floramicro before bloom and if your solution already has all that in it, it might mess it up(dunno how much all of that is just precautions on the bottle, but nonetheless it still says it on the bottle so I follow it) I'd dilute it in addback water, or go even safer and do a res change early.
Your plants did eat it all up as your using hydroton and that doesnt hold much water. grodan does though.
I'd add back nutes but make sure that you're not messing with the order they need to go in. Like im supposed to use floramicro before bloom and if your solution already has all that in it, it might mess it up(dunno how much all of that is just precautions on the bottle, but nonetheless it still says it on the bottle so I follow it) I'd dilute it in addback water, or go even safer and do a res change early.
IN33DW33D
Active Member
I burned a couple I think what do I do?
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mufastaa
Active Member
Ill need someone to back me up on this.. but im not sure thats nute burn that almost looks like a mild deficiency. I would still try putting it up to to 700-800 and keep a close eye on them. I had mine around 800-1000 after week 2 and my babies loved it. I also had pretty high temps (83-85) and added some co2 which may have helped idk, but these things should increase their metabolism.
IN33DW33D
Active Member
Yeah I think its a defiency too. Idk what though? Yo ima just dump everything I got except for calmag every and see what happens.
wheels619
Well-Known Member
hey check out this thread bro it will help u with a lot. looks burnt to me. dial it back. u may be over feeding them quite a bit at 3 weeks. how hot is the temp of ur room? after the first day how much did the water level lower? an inch or more in each of the buckets in just that one day or was the water level still the same? cuz 300 ppms is a ton for a plant that size to eat in just one days time.I burned a couple I think what do I do?
https://www.rollitup.org/general-marijuana-growing/488960-pot-plant-problems-visual-guide.html
wheels619
Well-Known Member
dont do that. look at the post above and chack out the link.
mufastaa
Active Member
yeah im not totally sure, but in general i would say if your ppms drop to add nutrients. But that is a lot to drop so i would make sure your ppm meter is working with tap water or something. Also i dont use a bunch of different nutes (i know 4 isnt alot) but im lovin the AN sensi grow/bloom 2 part stuff i got, ive been using that only and my plants grow like crazy and are lush green, plus they can take it at a wide range up to 1100ppm after week 2.
IN33DW33D
Active Member
They weren't at 300 my meter read wrong. I checked them all and they are all around 500-600 and my water temp is around 72. I looked at that guide but still cannot define the problem. Looks like nute burn but some others are tuning higher ppm and are beautiful as hell. I added some botanicare cn107 or some shit it's that 3-2-4 stuff. Added calmag to the sick ones so I hope that helps?? Im strugglin. My soils are looking good though got about 50u of them ;p
Someguy15
Well-Known Member
So they are DWC buckets? Usually I top out around 1.2 EC in DWC... so on a 500ppm scale that's 600ppm max. When you are using a setup where the roots have constant contact with the solution, you typically use 1/2 strength recommended. Ionic for instance recommends 1.8 EC therefore your target EC should be around 1 at the tops (500ppm) I would say your probably over doing the nutes if the Ph is spot on 5.8.
IN33DW33D
Active Member
So you're saying that once I add all the nutrients correctly my ph is going to be a little high and will need ph down? The ph was 5.5-5.8 when I first dumped nutrients in so I didn't adjust anything.
wheels619
Well-Known Member
u need to adjust ur ph after adding nutes unless ur nutes tell u to do otherwise. it would say it somewhere in the instructions on the bottle. and yeah shit i completely forgot dwc's arent supposed to be run at full strength nutes. its been a while since ive run a dwc. last i did. i got my plants up to about 75% nute strength before i would get burn at about 3 weeks. now i want to start another one. 