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Try again using soil and CFL's, when they get to 3-4 node repot in 3-5 gal container and place under your grow light at the mfr's height recommendation. Learn how and when to water, probably the most difficult skill to learn.

Welcome, lots of friendly, helpful people here. (:

Boveda packs, learned something new today....(:

Good on you for the concept! Only thing I'd look at is maybe adapting an inline desiccant dryer/filter (used when car painting) to your air pump supply? The longer an air pump runs, heat and moisture are added to the air supply. An automatic bud curer would be awesome.

Your cotyledon leaves are probably turning yellow because the new leaves are pulling nutrients from them that the plant can't get from the soil. Have you checked your water PH? I like it ~6.3

Welcome, have a good time and enjoy, lots of knowledge here :-D

Can you post a pic of the whole plant and where those leaves are located? It will help to diagnose.

H202 is used often for suspected root rot problems in all plants both indoor and outdoor. It does kill off both good and harmful bacteria/microbes so indoor plants are usually re-potted after treatment is successful. If you want to increase oxygen in soil look into fabric pots, mixing soil with...

The yellowing one is definitely a mobile nutrient deficiency, pulling from old growth to feed new growth, N, P, K, Mg, Mo, Ni. Hard to believe the nice looking one is liking PH8 water unless your soil is really buffering it, how's the calibration of your PH pen?

Right off I'd say your water PH is too high, in soil I go ~6.3, curious if your using the same water on that nice looking one? Watering everyday could be washing out the nutrients too.

Looks like they have had too much rain and now have a possible mag def (new growth green, old growth yellow-brown).

I'd go with Fatleg77's post, proper water PH is foundational to success.

Hi forum, new here, hope to learn more since I quit lurking and possibly contribute where I can. Thanks to those who run this site and moderate, I've liked the way its organized since I first found it a few weeks ago.