Changing Fertilizer Good or Bad?

I've never grown before so these are my first plants. Planted 05-22 and 6-23. Bought clones as tiny little things. Put them on auto water timer/system. I've used some flower food but I am told to use fox farms on these plants. Was reading also on the fertilizer. My question is - would it shock or do any harm to these plants if I started using the Fox Farms? Changing up their routine. [attachment=o285827]

None. You will get people saying to flush 1st, but thats total bs. Just switch.