hey, its definitely a strange situation, my only thought if your not using nutes and you water daily would be your soil mix. Add 1 cap full of h202 per 20ml of water, this will make sure any pathogens are killed. If that doesnt help change your soil. everytime you transplant your plant into a new soil you do want to do the water through,
let me know how it goes,
jd
let me know how it goes,
jd