What is going on here?

Starting from seed.
DWC Totes
Reverse osmosis
pH is kept between 5.6-5.9
Room temp is constant 72-76
Res temp is 69-73
This is under a 4 ft' 4 bulb t5 panel
Using GH flora series performance pack
Other than root enhancer Ive only started to add 1/4 strength nutes a few days ago.
What are these spots on my plant here?

I was thinking water drops or nutrient burn. Then I saw how you were growing it. Now I don't know. I use dirt. Please somebody help him.

Whats yr ppms? Have u sprayed anything?

Tripledme said:

Starting from seed.
DWC Totes
Reverse osmosis
pH is kept between 5.6-5.9
Room temp is constant 72-76
Res temp is 69-73
This is under a 4 ft' 4 bulb t5 panel
Using GH flora series performance pack
Other than root enhancer Ive only started to add 1/4 strength nutes a few days ago.
What are these spots on my plant here?


View attachment 3558007 View attachment 3558008 View attachment 3558009 View attachment 3558010

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I see you are using RO water, are you adding calmag? Looks like a calcium def.

blackforest said:

I see you are using RO water, are you adding calmag? Looks like a calcium def.

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After immediately searching for calcium deficiency problems from your reply @blackforest I think this is 100% the problem.

CalMag is the goto for hydro?

Tripledme said:

After immediately searching for calcium deficiency problems from your reply @blackforest I think this is 100% the problem.

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It certainly does look like it. If you use ro water, you have to use a calmag supplement. It's fairly cheap and goes a long ways. The leaves that have it on there now may never fully recover, but the new growth should be deficiency free. Hope it works!

Tripledme said:

CalMag is the goto for hydro?

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It's really more of a ro water thing than just 'hydro' some people use tap water for hydro and they don't necessarily need calmag supplement because the tap water usually has plenty of Ca in there. RO water filters out the Ca from the tap water.

blackforest said:

It certainly does look like it. If you use ro water, you have to use a calmag supplement. It's fairly cheap and goes a long ways. The leaves that have it on there now may never fully recover, but the new growth should be deficiency free. Hope it works!

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I truly appreciate your fast response to my problem. I'm going to head to my local hydro shop now and pick some up. Is there any other kind of supplement I should be adding to RO?

Tripledme said:

CalMag is the goto for hydro?

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Also, you are going to need to add something to keep the bad bacteria at bay. You need to either run a sterilizing agent (h2o2, zone, bleach) or run a beneficial bacteria (hydroguard, or ewc tea) otherwise you are almost guaranteed to get root rot (pythium)

Tripledme said:

I truly appreciate your fast response to my problem. I'm going to head to my local hydro shop now and pick some up. Is there any other kind of supplement I should be adding to RO?

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no, nothing else specific for ro water, just the calmag.

So I went to my local shop looking to buy some calmag and the guy told me to up my nutrient levels.

that does resemble calcium deficiency, however, if you're using all three of the flora bottles you should have calcium in your water. if this is the case, then it's your low feeding at 25% that is the problem. here's a feeding chart for you to use if you want.

https://www.google.com/search?q=general+hydroponics+flora+series+performance+pack&biw=1024&bih=614&tbm=isch&imgil=xc9NHmMB8GcatM%3A%3BSyYZOwrgMRNo7M%3Bhttp%253A%252F%252Fwww.growwurks.com%252Fgh-flora-series-performance-pack.aspx&source=iu&pf=m&fir=xc9NHmMB8GcatM%3A%2CSyYZOwrgMRNo7M%2C_&usg=__iV_wlJKf8b11gkVEdgTP42ZGkSs=&ved=0ahUKEwiU-rakvsbJAhWoo4MKHRUuAX8QyjcIVw&ei=g8VjVtSsDqjHjgSV3IT4Bw#imgrc=xc9NHmMB8GcatM:&usg=__iV_wlJKf8b11gkVEdgTP42ZGkSs=

Tripledme said:

So I went to my local shop looking to buy some calmag and the guy told me to up my nutrient levels.

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yeah, I would not listen to that person. I see new faces at the shop here in CO all the time, and most of them simply are not that knowledgeable about growing cannabis. ro water requires a calmag additive most of the time and I would say absolutely in your case. Your ec should be 0.6 - 1.0 right now (300-500ppm on .5 scale). You can try to up the nutes and see if that works, but I would add calmag if it were me.

the leaves are looking a little pale green and using 1/4 nutes is pretty low. the ferts should already have calcium. if not, then you add some, but only then. increasing the fert amount seems like a better choice since it also looks like the nitrogen level is a little low.