What is happening?

[Gilmour]

Hello guys.
I having some troubles with one of my 5 plants.
I returned today after 1 week away from home and this is what I found.

I am on the 4th week of flowering.

Room temps 23degrees

RH 40-45%

Thank you

 

[Creeperpark]

You need to do a pour-through and catch some runoff and test it. The plant that's bronzing is lacking calcium. It could be because of a drop in the pH or because you are not adding enough. Make sure you have plenty of air flow in the canopy.

 

[buzzmobile]

How was it watered while you were away?

 

[ilgattomatto]

Probably ph issues, try checking that

 

[Gilmour]

How was it watered while you were away?

using a timed waterpump

 

[Gilmour]

You need to do a pour-through and catch some runoff and test it. The plant that's bronzing is lacking calcium. It could be because of a drop in the pH or because you are not adding enough. Make sure you have plenty of air flow in the canopy.

I made it and the pH is on 6.00

Do you think I having a lockout of Calcium due to low pH value?

 

[Creeperpark]

Keep doing a pour-through on a watering day and catch some runoff and test the pH.

I made it and the pH is on 6.00

Do you think I having a lockout of Calcium due to low pH value?

IF you are using tap water to test the pH you may have a problem.

 

[Creeperpark]

What kind of water are your using and what kind of cal mag are you using?

 

[Gilmour]

Keep doing a pour-through on a watering day and catch some runoff and test the pH.

IF you are using tap water to test the pH you may have a problem.

I made the pour through with distilled water and the water coming out from the bottom of the pot have pH 6.00

 

[Creeperpark]

6 is a little too low because the pH can easily swing into the 5s and cause leaf bronzing. What kind of water are you using?

 

[Gilmour]

6 is a little too low because the pH can easily swing into the 5s and cause leaf bronzing. What kind of water are you using?

For watering I'm mixing tap water and distilled water (50/50). My tap water doesn't come from the local aqueduct, it come from my well. Normally I doesn't add cal mag to this solution because my tap water has some calcium but maybe isn't enough... (find attached the test I made).
Do you think can I add come cal mag? I have calmag from advanced nutrients.

 

[Creeperpark]

The best water is RO or Rain fortified with cal mag. Using tap water will leave impurities in the soil and can lock up calcium. Not enough calcium in the water will allow the leaves to bronze-like above. The above photos show how unstable tap water can be mixed with any water.

Make sure you have an EC meter too to check all your liquids.

Always start with the cleanest water you can get and stabilize it with cal mag. Keep the water stable and the same from the beginning until the end. When the water is stable and consistent, the plants will adjust and be consistent. Swings in the starting water will cause unsteady pH.