Switched My Light From LED To CMH Now I Have Problems?

PURPLEB3RRYKUSH

Well-Known Member
Changed the rez the other day because it needed to be changed. and just added cal/mag this morning because overnight the one plant got alot more brown spots on leaves and the other plant that had no issues other then wilting started to get brown leaves over night. Looks like the plants are starting to purk up abit and some of the yellowing is gone out of the leaves. Not going to go in the tent no more going to see if this cal/mag works!!
Sounds like u need a simplier method of growing
 

jtrizzy

Well-Known Member
how high is the light? if its not at least 3 feet away in that tent your gonna fry them CMH is a legit light next to the blurples you just increased your light probably 300% lol in that small tent. You should have went with a 315w cmh would have been plenty for that tent. CMH is a pretty intense light. Your over doing it man, you had hydro issues, now you went and added an insane amount of CMH light, your doing too much.
 

speed420

Active Member
Everything has been fine with the autopots untell now. yes the light is intense but my buds were right small with leds. this light on 630 in the last 4 days with the cmh are like 3x the size. I have the light 3+ feet above the tops of the plants.
 

PURPLEB3RRYKUSH

Well-Known Member
Everything has been fine with the autopots untell now. yes the light is intense but my buds were right small with leds. this light on 630 in the last 4 days with the cmh are like 3x the size. I have the light 3+ feet above the tops of the plants.
Your wasting electricity, one 315 cmh would veg out that tent and flower it nearly all the way till harvest. Humidity will lower with all that light/heat. My suggestion use one 315 cmh till about 3 weeks b4 harvest then add 2nd cmh for better bud development on edge of plants. My 2 cents
 

speed420

Active Member
Your wasting electricity, one 315 cmh would veg out that tent and flower it nearly all the way till harvest. Humidity will lower with all that light/heat. My suggestion use one 315 cmh till about 3 weeks b4 harvest then add 2nd cmh for better bud development on edge of plants. My 2 cents
My cmh has a dimmer 350/480/620/super I just set it on 350 and i will leave it on that and see how it goes. Now i notice my best plant is getting more brown stuff over the leaves :(
 

speed420

Active Member
Could this be from over watering? I am running the autopot system so the pots always set in water and the pots do feel abit heaver then normal. I think I am going to do a ph water flush and then shut my rez off and let the coco dry up abit but not 100% dry out
 

jtrizzy

Well-Known Member
Could this be from over watering? I am running the autopot system so the pots always set in water and the pots do feel abit heaver then normal. I think I am going to do a ph water flush and then shut my rez off and let the coco dry up abit but not 100% dry out
Turn off the nonsense autopot and just hand water after you flush. Don’t flush with just ph’d water. Add a small amount of calmag at least. Why do you even have a autopot? You water coco like every 3-4 days if your in the right size pot not sure your purpose for the autopot.
 

speed420

Active Member
Turn off the nonsense autopot and just hand water after you flush. Don’t flush with just ph’d water. Add a small amount of calmag at least. Why do you even have a autopot? You water coco like every 3-4 days if your in the right size pot not sure your purpose for the autopot.
I am using 15lt autopots. The reason I am using this system is because they are drinking alot of water and do not have time to water them by hand 2 times a day. The 2 plants are drinking about 20lt of water a week.
 

jtrizzy

Well-Known Member
I am using 15lt autopots. The reason I am using this system is because they are drinking alot of water and do not have time to water them by hand 2 times a day. The 2 plants are drinking about 20lt of water a week.
Your in 4 gallon pots....and your plant is tiny. I don’t believe a word you are saying. My plants are twice the size of yours and are in 3 gallon pots, in flower and are watered every 3 days in coco. Your plants do not need to be watered twice a day. You do you though bro, good luck With your plants.
 

coreywebster

Well-Known Member
Could this be from over watering? I am running the autopot system so the pots always set in water and the pots do feel abit heaver then normal. I think I am going to do a ph water flush and then shut my rez off and let the coco dry up abit but not 100% dry out
Do you have two inch of clay pebbles on the bottom of the pot?
Are your aqua valves working ok?
Air nets in your coco? Or air stones in your res?
 

speed420

Active Member
Your in 4 gallon pots....and your plant is tiny. I don’t believe a word you are saying. My plants are twice the size of yours and are in 3 gallon pots, in flower and are watered every 3 days in coco. Your plants do not need to be watered twice a day. You do you though bro, good luck With your plants.
Bro I have no need to lie i am just trying to get some help with whats going on. I have 20lt bucket i mix my nutes up in and put that in my rez. Buy the 7th day there might be 1lt of water in the rez. My plants are autos not photos and i was using a shitty led light up untell the last 5 days i switched to cmh. I was watering my plants 2 times a day by hand. if i only did the 1 water a day they would wilt so i stuck to watering them 2 times a day tell run offs.
 

speed420

Active Member
Do you have two inch of clay pebbles on the bottom of the pot?
Are your aqua valves working ok?
Air nets in your coco? Or air stones in your res?
Yes I am using 2 inchs of clay pebbles on the bottom of the pot with the air domes. valves are working fine never had any issues yet. I have a submersible pump in my rez that keeps the water moving/mixed

I do notice some roots are coming out of the bottom of the pot. I use the netting that comes with the autopots copper side down.
 

coreywebster

Well-Known Member
Yes I am using 2 inchs of clay pebbles on the bottom of the pot with the air domes. valves are working fine never had any issues yet. I have a submersible pump in my rez that keeps the water moving/mixed


From my perspective it looks like a root issue too.
The overwatered appearance is probably shock from going from weak lighting to strong lighting. As already stated.
The twisted growth lower down could be root rot, but inclined to think otherwise if you have air domes and well circulated res.
The domes could be drying certain section of roots out and its reflecting in certain areas of the plants.
I may be way off with that theory though but when ive seen specific parts of the plants damaged and weird its been because I have damaged part of the root zone (for me by staking through it)

The copper should be face up under the pot in the tray I believe. To halt root growth as it comes out of the bottom of the pot holes and touches the copper. I don't think that's related to your issue though.

I would turn off your pots and top water when medium has dried out, do that for a week. Probably worth sterilising the medium with h202 in your water as a precaution against rot.
Hopefully the fucked up growth resolves itself or dies off and your plant picks up a bit.
One other thing you can do is make sure your pump that is circulating water in the res is disturbing the surface as this will add more o2.

There are lots of folks on here watering multiple times a day with outstanding results btw.
 

zeus2025

Active Member
I’m having the same exact issue with
my CMH lights in regards to leaf deficiency. Whenever I would put them into flower, the same exact thing would happen within the same timeframe and everything. Still trying to figure out how to correct it.
630cmh 3’ From canopy.
Soil DNC and 1/3 perlite,
Recently added to soil - dnc earthworm castings, oyster shell, langbeinite integrated with soil via recommend dosage (Added these to remedy) still having issues.
Past Nutrients GO calmag and Biothrive
Jamaican guano (still had problems, all recommended dosage and feeding schedule)
65-75 lights on - lights off
50% rh
PH 6.5-7
May just switch back to synthetic nutrients.
 
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