Overnight problems in week 7

[mb5322]

Problem: Popped up overnight

Medium/grow method: DWC

Feed: and supplements used:
Fox Farm trio plus fox farm beastie bloomz, cha ching and open sesame, weekly add ins: Cal Mag 1 tsp per gal and Fulvic acid 1 tsp per gal
Fox farm shedule done at 25% ppm this week is 650ish
ph checked 3x daily 5.8 to 6.1

water source:
RO/DI

Strain/age:
White Widow from ILGM, 7 weeks old on 10/01/21

light used:
Bloom Plus 4000 X 3 at 3 feet, all 3 of these are not over this plant there are 3 over a 10x5 tent

Climate:rh is 42 to 49, temp is 78 day time and 70 night

Additional info: recently moved from 3x4 tent to new 10 x 5 tent 3 days ago


I initially thought it was Cal/Mag lock out as this girl has been screaming for cal/mag the entire 7 weeks, but at week 2 I started with full strength cal/mag for 4 gallons of water, this popped up over night, lights run 20 on 4 off. Leaves feel dry and brittle as well, G13 next to this one is doing just fine starting into week 6 for her.

 

[Mañ'O'Green]

That looks like a phosphorous lock-out to me. Most likely from too much calcium.

You need balance in your reservoir.

Tutorial - A word on Nutrients

The proper use of “salt” based fertilizer to grow Auto Flowering Cannabis. Salts: Natural and man made any chemical compound formed from the reaction of an acid with a base, with all or part of the hydrogen of the acid replaced by a metal or other cation. Learning how to use salt based...

www.autoflower.org

 

[mb5322]

That looks like a phosphorous lock-out to me. Most likely from too much calcium.

View attachment 1373775

You need balance in your reservoir.

Tutorial - A word on Nutrients

The proper use of “salt” based fertilizer to grow Auto Flowering Cannabis. Salts: Natural and man made any chemical compound formed from the reaction of an acid with a base, with all or part of the hydrogen of the acid replaced by a metal or other cation. Learning how to use salt based...

www.autoflower.org

Thank you switching out Reservoir now minus the calmag

 

[Mañ'O'Green]

If you are running RO or DI you might need some Cal-Mag but only 50 PPM, (If you are using silica always add it first and give it time to mix well.) just mix it in and wait a bit before you add the other nutrients. PH it then put it in the res. Never mix the nutrients directly in the root mass. When I was doing DWC I mixed my res change the night before and aerated overnight. PH again and it seems to help stabilize the PH a bit. I am constantly working the PH, I really need to get a dosser.

 

[Peacefulgarden]

If following fox farms feeding schedules I would check my ph meter for accuracy

 

[mb5322]

If following fox farms feeding schedules I would check my ph meter for accuracy

Yeah, I calibrate like once every 2 weeks, fox farms really bottoms out to like 3.7 with my water.