bronzing and drying leaves

[catjsk]

I germinated a feminized seed (about a year old) on 1/12/24, moved it into a rapid rooter and kept it under a dome until she sprouted the calyx. On 1/23, I moved her to hydro. Kept her semi-moist with a dropper of water mixed with clonex. Root appeared on 2/1. Changed water and moved to General Hydroponics Nutes with calimagic and root guard. Using the suggested measurements and weekly schedule from GWEasy. Also using a humidifier in the tent and humidity ranges between 30-50%. I/m using a metal halide bulb. On 2/9 - the brown/bronze spots started on the first leaves. I thought maybe I added to many nutes. Changed the water, and used the amts suggested for week 2 of the grow. Also lowered the ph to 6. 2/12 - new leaves were looking healthy. 2/22 changed the water and used 5 week amounts for the nutrients. Leaves were starting to spot again. 2/25 topped her and trimmed the affected leaves. I'm attaching a pic of the leaves. I'm stumped - feels like I've got everything covered. No idea what could be causing this.

[crucialbunny]

I know virtually nothing about hydroponics but from what I know about cannabis, your leaves have the classic signs of over fertilization.

[Allenpro]

That looks like classic nute burn to me. When it comes to nutrients and hydro I usually start at 1/4 strength until I am familiar with the mix and the strain. Healthy roots can take a lot more than less than healthy roots too. What's the temperature of the water and are you using hydro guard or some other root inoculant?

[catjsk]

Thank you both for the quick responses. Changed the water and started with 1/2 the nutes I was using. Fingers crossed.

[Allenpro]

And just in case the Weed Police are watching the first set of leaves are called the cotyledon, the calyx forms after flowering starts.

[catjsk]

Thanks. The weed police stayed away.