COCO COIR Plant burning;urgent help

[Ansh2910]

I am growing in 4x4 with 400 watt real power drawn from wall. I am using coco coir+perlite as growing medium.
I will be sharing photos of plant and leaves,plus Nutes and lights that I am using.
i am using in quantity as suggested for tomatoes.
I am using 2 lights 200wx2
i have already flushed twice
there are some blue deposits on medium which I will share picture of

[Ansh2910]

[Canuck147]

Good day Ansh2910 - plant looks real good. I don't see a problem with the plant. Maybe fill up your pot with your grow medium.

Blue stuff on top? - I don't know - I get green algae building up on top of my soil - all i do is fluff it up and work that algae back into the soil. I guess maybe it's bluecuz your using coco?

Surely you have more in that 4x4.
Good luck growing.

[Ansh2910]

Brother,tips are burning see in the picture and eventually leaves are dying

[SoOrbudgal]

Transplant into new soil if you already tried washing the soil which is flushing the soil.

[Canuck147]

Okay - I see a little nute burn - does it go all the way to the stem and make the whole leaf yellow? If yes then maybe it's a root issue. Water with plain water next couple of waterings? I have had tips burn like that when I used regular molasses.

[ChadWestport]

What is the NPK ratio on that tomato feed? I've seen it in a 20-20-20 ratio before. If the NPK ratios are too far from what Cannabis typically wants at a particular stage of growth, that can cause issues.

[Ansh2910]

Okay,thank you.
But can still anyone tell me after seeing my Nutes and lights picture,at what height should I hang lights and how to use Nutes,plus I water once my plants weekly and still top soil always remain moist.

[ChadWestport]

Pic is too small, can't see the ratios for NPK. Most companies will have a feed chart on their website.

[Ansh2910]

And what’s the correct way of flushing.
This is my first grow please help.

[ChadWestport]

In short, flushing is running a large amount of water through the soil to wash out salt buildups. The rule of thumb is 3x your pot size. So if you are using a one gallon pot, flush with three gallons of water. There is a guide on this site that walks you through it. Typically this is only done in the last two weeks of flower or if you have nutrient buildup or Ph lockout during any stage of growth.