PLS HELP. Leaves spotting n starting to die

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GG504

Active Member
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
 

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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
 
I have cheap ec/ppm reader it goes from 5ish to 7ish. Working on getting better one any good ones I should consider
 
GG504 said:
I have cheap ec/ppm reader it goes from 5ish to 7ish. Working on getting better one any good ones I should consider
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It’s leaf septoria. A fungus.
Remove all infected leaves ASAP, Make sure to keep the ground under your plant clean.
 
GG504 said:
I have cheap ec/ppm reader it goes from 5ish to 7ish. Working on getting better one any good ones I should consider
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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.
 
Wattzzup said:
I see cal def and mag def. on your leaves
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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
 

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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.
 
GG504 said:
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.
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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
 
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
 
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