Fat banana auto & Royal AK auto

I think i figured out what might have been the problem. Yesterday my fat banana started also showing clear early symptoms of nute burn (yellow tips on the top leaves) after only giving her water. The Day that the pistils and tips went beige/yellow is also the day my warmth mats arrived and placed them underneath the pots. Is it possible by raising the temperature of the roots, more nutes were released than she's used to? If this is the case, I think everything will be fine after just giving water for a few days. the soil temperature was 18°C before, now it's around 20-21°C

Thanks for all the replies fellow growers! 🙌 12" is the closest distance in flowering phase for my spiderfarmer fs1000. I put it back at 16". I thought 12" might already be okay because the top of the plants aren't positioned in the center of the light. Using my (photo/cine) light meter I measured 1 full f-stop light difference from side to center. I also don't think it's nute burn. I can't measure my soil tho. But de solution just has a ppm of 420 or 0.8EC and my soil and nutes manifacturer scheme says I could already be adding 1.8EC. Not trying to overfeed her because it's my very first grow. It could be I touched the pistils with my nose while smelling the top of the plant 😅 It's also just the top bud pistils of the AK which turned beige. All the other pistils of the plant and also all the pistils of my fat banana are just thick and white I'm going to keep the light at 16" and not give her nutes for a few days. I don't think there's allot more I can do to figure out what it is at the moment.

You might be able to raise the Ec a little. In this phase 0.8 is a little bit less than the floor is full 👍