Recurring deficiency

[BillyWu]

Yeah had a look through the tent, no bugs

Nutes are looking fine, several of them are brand new bottles. I'll empty the res out and make a new one

 

[BillyWu]

Still having problems pH is at 5.8 and hasn't moved for like 2 days, EC is 1.37.
The top leaves are getting pale so I'm thinking maybe calcium deficiency? Not sure how I should fix it though. I can't provide photos under natural light I'm afraid due to the location it's in.

 

[Waira]

pH is fine for hydro, so most likely this is a toxicity issue as mentioned,...or,... how far away is the light? The leaves look a bit cooked, not just nute-cooked perhaps,.... symptoms showing worst up high like this is usually a clue,... with all the feeds, I can't believe it's a micronute defc.,...

 

[BillyWu]

pH is fine for hydro, so most likely this is a toxicity issue as mentioned,...or,... how far away is the light? The leaves look a bit cooked, not just nute-cooked perhaps,.... symptoms showing worst up high like this is usually a clue,... with all the feeds, I can't believe it's a micronute defc.,...

The light is about 1ft above the very top of the plant

 

[Mr Green Fingers]

Bro if I was you I would flush her with something like canna flush for a couple days and then start feeding again, also make sure your PH meter is callobrated, personally I aim for 6.0-6.1 as don't trust PH meters to be 100% accurate so this way I'm in the middle of the acceptable range so have a bit of leeway, I also let the PH drift as different nutrients are taken up at different PH levels but hey I'm still a newbie only on my 2nd grow but I've not had any issues doing it this way

 

[Waira]

...move that light up to 18", it's too close,...