HELP! Leaves turning brown and curling up :(

[Ramsamsam38]

Please Help!
Can you guys tell me if this is a nutrient burn and what kind ?
Or is it a light burn?I try to keep my mars hydro sp250 at least 12 inch from the plants which are already flowering (autoflowers,week7th).Im growing in coco coir with GH flora series.

[Gjourney101]

What wattage is your lights? It's usually 18" +. How often do you feed?

[Ramsamsam38]

It is currently set to 180W .Mars hydro recommends 12"-18" for bloom.I fed them every second watering (water,food,water,food)

[JohnEmad]

I have the same light and if I am not mistaken Marhydro recommends no less then 16 inches above for bloom so I assume you have light burn.

[Ramsamsam38]

[JohnEmad]

Hey Ramsamsam38,
Not sure if a Marshydro rep gave you that information or someone else.
I checked the paperwork that came with my light again to be sure and this is a picture of the information that came with the light straight from manufacturer.

maybe it isn't light burn but I have my lights 18 inches above and have no troubles.

good luck.

[homegrown]

Ya Ramsamsam38 i think someone gave you the wrong info. I dont run Mars hydro, but even my viperspectra dont recommend lights that close during flowering. It does look like light burn, try and back your lights to max rated distance, see if the plants respond well, then start closing the distance a half inch every day. And I would take JohnEmad 's written info, over some nice lady, that refers to me as dear in their reply...err i hope its a lady. LOL

[SoOrbudgal]

Yep raise your light, i got " real " instructions from the manufacturer like JohnEmad did, a booklet and single sheet. I learned by trial and error where the sweet spots are and light distance. Don't wait too long to correct. This is a good practice lesson...sorry we all learn by making mistakes.

[Ramsamsam38]

Thank you so much guys.I appreciate your help! I found my info on amazon (mars mydro sellers profile) well it was all wrong...I raised my light today and hopefully everything will be back to normal within some time.