do u think this is nute burn ?

this growing game aint easy man, got nute tip burn yellowing of bottom leaves and new growth as shown yellow tips since the begining even before nutes were aded, there five weeks old now 1 week into 12/12 just repotted them it went well, waterd wiv epsom salts only ! and got a low ph run off wen i did a soil water test it come out at 6.2, i was advised to add a pinch of E.S and it shud fix the yellowtip thing on all new groth, but heres the big problem i av nute tip burn n yellow leaves so wat does one do ? add nutes ( more burn and lockout ) add no nutes n the yellowing wich looks like lack of N will continue, what the hell shall i do peeps ? pls help wiv some sound advice ! coz i am new i will never give up untill i get a good system that suits me so i need to no were i am goin wrong guys !

flushing them may help, salts may have accumulated. also in soil keep your pH at 6.5

yup, flush it out every-so-often, then, when your back to nothing in there, add nitrogen (yellowing from bottom upwards, that will stop)

salts and fucked up pH will keep them from absorbing stuff.