SOS Help Please!

I thought it might have been the nutes, started using bottled water only the last week+. Over watering? The bottom fan leaves have all turned yellow and are beginning to die or already have. The mid fan leaves are starting to get a bit of yellow on the tips. Any thoughts?

how often are u watering? are u letting the pot git lite and the soil dry b4 watering?

may be over/under watering. id keep waterin with no additives, n wait til at least the top 1" of soil is completely dry in between. tats jus me tho... but it is based on what ive read here lol. RIU hasnt let me down so far!!