Worm castings and bottled nutrients?

So it's my first time growing indoors. I've had some clones for about a week now. When I first got them they were looking rough, but in the last week i've improved their health quite a bit. When i first got them they were very yellow and had a lot of dead leaves. Now, the new growth is very green but starts to turn yellow around the edges after a couple days. there are also some burnt tips on some of the new leaves. I'm using coco coir, biothrive grow and cal-mag. I was thinking of topdressing with worm castings, but I have a couple questions: should I cut out the cal-mag after topdressing? and how much worm casting should I use? I believe my girls are showing signs of a zinc deficiency so I was hoping topdressing with worm castings would help. Besides it's good for the microbial health of the soil right? any recommendations from experienced growers? I'll attach pictures of the ladies. and it looks far greener in real life than in does in the pictures.

Top dressing coco with worm castings? I'd just feed bottled or dry water soluble nutrients. Are you pHing when you feed? Those plants are small right now so you don't need to water that coco everyday. They look like they're drowning. They also show signs of bugs. All the little white specks on the leaves.

Coco isn't soil. It's best treated like hydro. If you want to grow organic, soil would be a better choice. It can be done with coco but most seem to run into problems. There is a guy amending coco on youtube that a bunch of people apparently watch but his plants look like crap so I wouldn't do anything that guy does.

xtsho said:

Top dressing coco with worm castings? I'd just feed bottled or dry water soluble nutrients. Are you pHing when you feed?

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Yes the fertilizer that I use will ph the water for me, it brings it down to about 6.2. How can you tell that they're drowning?? and what should I do about the bugs? And will the bonticare cal mag and biothrive in dechlorinated tap water be enough?