PLS HELP. Leaves spotting n starting to die

[GG504]

My fan leaves are spotting turning yellow and are starting to die. Everything was good at first until I changed my res. Ph is currently 5.8 room temp 75-82f light on 62-70f light off. Water temp 66-69f. I use ro water n an

 

[Jakematthew426]

Did you check for spider mites

 

[GG504]

No I will get microscope n check but I highly doubt that. I keep everything sealed off in my tent also I tend to keep it clean

 

[GG504]

This problem arises soon as I changed my res

 

[SheeshM]

How is your EC or PPM? Are you using Cal-mag?

 

[GG504]

Didn’t use cal mag. Just part 1&2 of an

 

[GG504]

I have cheap ec/ppm reader it goes from 5ish to 7ish. Working on getting better one any good ones I should consider

 

[Pmurp]

I have cheap ec/ppm reader it goes from 5ish to 7ish. Working on getting better one any good ones I should consider

It’s leaf septoria. A fungus.
Remove all infected leaves ASAP, Make sure to keep the ground under your plant clean.

 

[Wattzzup]

I see cal def and mag def. on your leaves

 

[Bernie420]

I have cheap ec/ppm reader it goes from 5ish to 7ish. Working on getting better one any good ones I should consider

You really need to know what he ppm is and what the ph is doing hydro. Get the ph drops to double check your ph meter.

Plant looks like its P deficient.

This didnt just happen overnight, you're just now noticing it. Get a proper ppm meter, maybe get a different nute line,

if you use r/o water you should be using cal/mag to stabilize the ph.

 

[Pmurp]

I see cal def and mag def. on your leaves

the yellow is in spots, not in blades of the leaves.
Also cal deficiency causes dark spots not yellow.

pic 1: cal def
Pic 2: mag def
Pic 3: septoria

 

[GG504]

I changed my res last Sunday before that my plants were just fine. I carefully observe my plants everyday day but since I change my res that’s when spots started occurring it’s been a week n this is the results. My oh is always 5.8 -6.2. I only let it drift up to get intake all it’s nutes. I’m not sure the exact ppl but it’s only a tad bit over how much nutes I put in my last res. My floor are cleaned wit h202 also put in my res every 4 days. I do recall adding cal mag to my last res so maybe that’s the problem.

 

[Bernie420]

I changed my res last Sunday before that my plants were just fine. I carefully observe my plants everyday day but since I change my res that’s when spots started occurring it’s been a week n this is the results. My oh is always 5.8 -6.2. I only let it drift up to get intake all it’s nutes. I’m not sure the exact ppl but it’s only a tad bit over how much nutes I put in my last res. My floor are cleaned wit h202 also put in my res every 4 days. I do recall adding cal mag to my last res so maybe that’s the problem.

You need a ppm meter.

I do recall adding cal mag to my last res so maybe that’s the problem. NOPE. unless you added a shit ton cuz you dont have a ppm meter to measure how much you are actually feeding it.

h2o2 can burn fine root hairs fyi

 

[Tib420]

You cant use RO water without cal-mag. Your better off just using tap water if you dont add cal-mag to RO water. What your seeing is a micro nute deficiency from not adding any cal-mag to your rez. Tap water already has these nutes in, where as RO completely gets rid of them. You should empty your rez and fill it like this RO > Cal-mag > silicate > Part A > Part B > Ph down

 

[GG504]

Just added calmag today will see what the results will be

 

[Tib420]

Just added calmag today will see what the results will be

You can't just add cal-mag at the end smh now you might have a toxicity

 

[GG504]

This is my first grow. When do I supposed to add?

 

[Tib420]

empty out your rez cuz your ppms are probably all over the place and start a fresh new rez.

 

[GG504]

Wow never knew that i just thought that u put ph up r down at end

 

[GG504]

Also instead of silicayi use h202 is that ok. Someone just recently said that it burns new roots