Is this phosphorus deficiency? Help please.

@JohnDee you're right, its quite difficult. Lol I'm fine with getting teased man, part of being a newbie. Thanks for being cool.
@Chip Green when I find one I might just do that. These plants are a hell of a lot more resilient than I have always thought.....it confused me how they can be so touchy but still have the capability to grow and spread faster and more efficiently than pretty much any other 'weed'. So I guess i should have known from the start but at least I'm learning. Also about the watering,i water maybe every 3 days, I check the soil before hand and even then I still like to wait until i see a small bit of drooping so I know the girls are thirsty.
I read somewhere that epsom salt water is basically cal-mag, just for some better and stronger growth, how often do you think I should use it? Since its able to dry and calcify, I'm straying away from often but the article said that weed loves the salts and it helps boost foliage growth.

Turned on my girls lights for the day and found a little garden protector....daddy long leg setting up shop in my super low budget grow box.

SS,
If you have a known mg hog (such as White Widow) you should add a low dose of Mg to your standard feeding schedule. Look up a sick ganja tutorial and inspect the leaf pattern. deficiencies can be dramatic or subtle depending on degree of deficiency.

You can use calmag if you need the Ca++...or go with epsom salts if you have a handle in Ca++ balance and don't want to disturb it.

As an example, you could be growing in 200ppm water with lots of Ca++ in it...and need to add mg so use epsom salts. Won't increase your calcium and the S can be used by the plant. Be sure to dissolve in warm water first...then into nutrient container. It's hard to dissolve.

For a maintenance dosage I use 1/4 tesp...a gram or so per gallon. For full-on deficiency dosage I use a full tsp (6 or 7 grams) per gallon.

Use calmag if you need to add Ca++ and mg+. Say if you're growing using RO water. Might need the calcium then.
JD

PS Daddy long legs! Hope he eats any pests hanging about.

Thank you, I put about a teaspoon in a 2 litre and dissolved it. I give just shots of that to reduce the chance of overdoing it, plus it keeps me from overwatering.
For ca++ I could always grind up some egg shells, I did that for a PH imbalance and ca++ deficiency, worked pretty well even though it turned out to be a male.
Two are up to the fourth node/working on the fifth, so I'm thinking I'm going to top them and attempt to lst the new colas into a kind of spider leg shape so hopefully all the buds get light. 2 weeks and 2 days old, you can only top them twice right? Sadly I only have the 150W LED on them so I'm not sure what kind of yield I'll get but I hope to do enough to them to maximize with what I've got.
Ss
P.s
I'm hoping that more will. I've in, they're all over in my room and whatever was eating holes in my girls is now eaten

SS,
You may want to read over the nugbucket main-lining tutorial. I believe that will accomplish what you want to do. But till you get to that skill level...a couple toppings will do.
JD

Ill do that for sure, thanks again man.

Hey, can plants change color during veg? The leaves are going purple and the leaf stems are pretty dark purple. Something seems off about it. I took a few pictures, you can zoom pretty far before it gets blurry, also there are random dog hairs floating about/landing on the leaves...ugh... The color has been going on pretty much since the second or third node, they're 2 weeks and about 5 days old now. I gave them their first run of nutes yesterday, didn't give much just to gauge how they would react and the growth has indeed sped up but as they grow (only two of them are doing this) the purple is getting darker. Also, I'm pretty sure I had spider mite so i started treating with rosemary oil/peppermint oil water mist yesterday, did it again today before the pictures so that's why the leaves look droopy. Also there is tape hanging for anything that may fly into it so that's what's on the last picture. I'm not freaking out but I haven't seen anything that says they change from green during veg, so I'm wondering if it really is phos def. Or is it just, once you bring that 'sunscreen' out from being too close to l.e.d's, it just carries on through the plant?

Oh. I changed the lights to 150w CFL