Orange Sherbert

Without a picture of the actual plant/s with the problem makes it hard to form an opinion. Otherwise it is a guess between inadequate lights, not enough nutrition or if it is only the cotyledons (baby round/non serrated leaves) that have gone yellow, then that is perfectly normal. Also, I am not sure why you are feeding "Flora Bloom" to days old seedlings, "Bloom" nutrients are called "Bloom" for a reason - they are for when your plants are flowering! Really need a clear, close up picture or three of the actual problem to be able to give you any meaningful help. Cheers.

Nitrogen starts yellowing at the bottom, if you have abnormal growth or yellowing on new growth it would be calmag.

this is not a deficiency is a micronutrient lock out, you want to reduce the micro and check every bottle for what it contains, often times they will all contain N which will throw your balance off as well as overlapping contents like magnesium etc. keep it simple to avoid this kinda issue or start simple and add products one by one dialing the whole thing in over several grows . Hopefully the plant will bounce back

Hey there again! Nice work so far! So the idea is the following , EC/PPM measurements are “proxies” used to measure the quantity of feed in the solution. But not all nutes are created equal , some raise it more but are less dangerous some raise it less but are more dangerous. The less dangerous one is micronutrients , so you add that first and then measure your EC/PPM . That’s your basis for the next juice which is NPK , here you have to be a bit more careful. That’s just the basic reason why there is an order for the measuring . You don’t need to follow this but it sometimes helps to not make a mistake or something . Hope this helps ! 🚀