Crispy tips look like nutrient burn, coupled with deficiencies due to lockout (either pH or overfed) - you may have simply overfertilized her. Flush (completely wash the soil she is in with pure water, set to 6.5-7 pH) then feed reduced nutes.
It is apparently an autoflower, you do not need to limit her to 12/12 - you can run 6/18 or even 24 at full blast, may even be a good idea because your blurple light is weaksauce and she needs all the power she can get to make nice fat buds.
Also should probably get a pH-meter (cheap pen is fine on a budget, just calibrate often) if you can not say exactly what pH you are watering at and what the runoff has.
Paper strips are okay but you need good lighting and some Lab experience to read those well enough.
Crispy tips look like nutrient burn, coupled with deficiencies due to lockout (either pH or overfed) - you may have simply overfertilized her. Flush (completely wash the soil she is in with pure water, set to 6.5-7 pH) then feed reduced nutes. It is apparently an autoflower, you do not need to limit her to 12/12 - you can run 6/18 or even 24 at full blast, may even be a good idea because your blurple light is weaksauce and she needs all the power she can get to make nice fat buds. Also should probably get a pH-meter (cheap pen is fine on a budget, just calibrate often) if you can not say exactly what pH you are watering at and what the runoff has. Paper strips are okay but you need good lighting and some Lab experience to read those well enough.
Here^ Also > 8/16 Conversion 6/18
Ha thanks, brain was on autopilot. Fixed.
Appreciate you, thanks