with house and garden its pretty good i dont change at all in veg and prob twice in flower u can use stuff like omegazyme and cycozyme to help with molds and drip clean for salt build up peace
u are gunna need way more light like heaps cfl wont cut it sorry to say people here are giving u false hopes u need about 18-24 20w cfl's just for a good veg double that for flower also u need 2 types coolwhite for veg warmwhite for flower
thats normal for week 5 from now onwards she will get more and more yellow due to her starving for nutes u can give it as much as u want she aint going green again