This. But having extra calmag on deck in case of deficiency showing its face is always a good idea. I keep multiple kinds of each nutrient. Some more readily available then others. But all pretty effective.
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I’m a soil guy myself. Coco seems like a bit more work than soil. Welcome to the community. Great folks here to help you out in this forum!
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Hello!
Just a little update, unfortunately I cannot provide a photo since my phone carked it a few days ago.
Things are going well-ish? I have my second lot of leaves coming through, my little fat circle leaves are still green.
I increased the light intensity last night slightly and today i notice some slight yellowing on my main two top leaves.
Now I’m assuming this is because I might have turned the light a little too bright?
But im also wondering if its some nutrition deficiency, so I fed her for the second time today (9 days since sprout)
Now a few extra questions for the professionals on top of the main question above;
Should i be feeding her every water? & I’m assuming I should only be watering when she needs it? Aka when i lift my 5gal bag and feel its so light it needs a water?
I have also since removed my humidity dome since I dont want any mould growing.
I have been feeding @ 5.8, today was the first time i PH’d the runoff as well and thats 5.8 too, does this mean she isn’t taking the nutes? THANKS IN ADVANCE HOMIESS 
Shouldn’t be experiencing a nutrient deficiency because if the little cotyledons aren’t yellowing or dying, she has enough nutes.
Do the upper leaves happen to look a bit like this:
Yes.
Jury is out on this one. It’s good to water coco every day so it doesn’t start leaching nutrients and also so it doesn’t dry out on you and become hydrophobic. That said, I actually water once every day or every two days, as my plants drink more/less.
Not necessarily. It means you’re keeping the “in” consistent at 5.8. The PPMs out would be a potential indicator that she wasn’t absorbing nutrients. Even then, not necessarily- sometimes high PPMs coming out mean that the expended nutrients are leaving - thus registering high on the tds meter.
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No no not near that bad, im talking very slight discoloration, its only when i shoved my face right next to it i saw the colour was a tinge yellow, im assuming this is due to the slight light increase then.
Thanks a lot for your help!!
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If it looked like that but extremely mild, then yeah absolutely it was probably the beginnings of light burn. That’s a photo I took to have a good example of extreme light burn handy. 
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Soil grower here but I did experience coco for the first time with clones from a good friend recently. Didn’t realize it was coco until I asked! Started nutes but she lost some leaves😢. New growth is explosive and healthy when I up-potted them to larger soil containers.
You have a lot of great growers tagged in that can answer your questions!
Best wishes to you!
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Yea its kinda tough to diagnose properly without a picture to pick apart. You say its on the first true leaves. Just the very tips?
Like this?
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@ThreeStax her mine are
Some lower leaves discolored and one late sprouter, all in final pots of coco loco. Feeding 1/2 dose PartA pHed to 6.3
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@Graysin @6stringT @PurpNGold74 @Deepsix
Kia Ora everybody! I have finally got a new phone so I’m back with some photo updates & obviously some noob questions along side 
Uploading: IMG20220520165022.jpg…
Shes looking healthy yeah?
Q1. At what time should i be changing from Grow to Bloom? Is there something i should be looking out for on the plant or is it just a timing thing from first sprout?
Q2. Humidity, what kind of Humidity should i be looking to get during the next few weeks, should i be purchasing a dehumidifier?
Q3. At what point can i start training the plant?
Q4. Is there a light distance/dimmer infograph someone can provide me? I still have the light on 50-60% power, just wondering when i need to be increasing the height/power.
Many thanks!!!
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I would wait until she is beginning to display a small explosion of pistils where her first few pistils emerge. Often called “buttons” or “hedgehogs” because they’re dense and random. That’s when I’d be formally using the Part A and B of your Bloom.
I’d be using Part A and B of your Grow all the way until then.
Let me post this chart - it lists ideal ranges for heat/humidity combos.
I start after the 3rd real set of leaves forms. By then the stalk is usually thick enough to support a little bending.
Sort of. If you use Photone to measure your light intensity, you can follow this chart:
Yep! Keep chugging.
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Amazing, thank you so much!!
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Oh one more question,
My light cycle is at 24/0 at the moment, when can i change it to 18/6?
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One final question for the time being i hope,
I’ve been reading up on multiple sources saying i should be feeding daily,
Is this to the same amount of 20% runoff? & if I make 5L of nute water, can i re use that the next day if i don’t use it all? Or do i have to throw it and make a fresh batch each time?
THANKS 
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You can use it, nute water is generally stable for about 3 days before it starts getting wonky. If you keep it bubbling with an airstone or moving with a wave maker it will last longer, but pH drift for premixed nutrients is very real. Even for hydroponic growers like myself there is such a thing as “too big” or too much water in the reservoir.
You should be watering daily. It makes solid sense to feed every time you water. At the very least, you should add CalMag to every watering because that’s what the coco will try and leach out of your plant’s root zone if you don’t consistently resupply it via watering. I have some awesome calcium buildup on the top of my coco from when I didn’t follow “the rules”. It doesn’t always hurt but more sensitive plants definitely let you know that you fail them
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Sorry I just saw this. You can change your light cycle whenever you want to.
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I think I’ve encountered my first hiccup!
My perlite is turning green?
After some googling it looks like its Algae growth?
Does this mean i am watering a bit too much?
Should i just let it dry out a bit before the next water?
Thanks in advance
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You got it! Dry / wet cycles is good for weed. And look out for fungus gnats when the surface gets that damp.
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Yep. @6stringT has you covered - just reduce watering a bit - whether that means less when you water or less frequently, either one will do the trick. Algae only grows where it’s exposed to light, so you can just sprinkle a layer of medium over the top of the green stuff and it’ll die. Algae generally isn’t harmful by itself but it does warn of a host of other potential issues (such as a root zone that stays too wet and may turn into root rot).
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Thanks @Graysin , and may I suggest mixing in a handful of Diatomaceous Earth with the extra topping of soil. Just don’t get any on the leaves.
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