Brown spots what is it?

my plant leaves were curling an i was told i was over watering it and to take some water out so i did and a few days later the leaves were still curled and these tiny little brown spots started on it these are the only two but what is it?

E-indoor or outdoor---Indoor
E-soil, soilless, coco, aero, or hydroponic---Hydroponic
E-specific medium---Perlite
CSL-Soil type/brand---N/A
HCL-Hydro/aero/soilless system type---DWC
SCL-Anything you have added to the soil---N/A
SCLR-Soil or slab runoff pH---6.0
E-Water source---Small Tub
E-Source water pH---6.0
HRT-Source water EC (if hydro)---Distilled Bottles
E-Age of plant---5 Days
E-Type of fertilizer---General Hydrophonics
E-Rate of application (if hydro, this is your PPM number, preferably after each component is added)---unsure 2.5ml/us gal
E-Lighting source and distance from plant---23 watt CFL 3" away
E-Air temperature (both day and night if you are running a dark period)---70*
HD-Reservoir temperature---68*
E-Air % Relative humidity---53%
E-Lighting schedule---24/0
E-Type of ventilation your room has---fan
TR-Did you pre-soak your media in pH corrected solution?---no

that looks like a nute burn to me. no need for nutes at that age.

and yeah, you're watering too often.

not a big deal, though.