well,  that's great.  If your sweetheart had three meals and two snacks in a day.  You can try nanpro brand. It's good.  Choice is yours.

i give her breakfast.. lunch n dinner along with bf..

her weight does nt show much inprovemnt.. she is average weight.. dat is 6.5.. fr 8and half months.... so if yes which formula do i begin with n d quantity?? birth weight was 2.9

Hi Raveena dear,  well 30ml per feed is very less quantity. Yes,  you can offer formula milk to ur baby.  After six months, even you can give mashed bananas,  mashed potatoes, weaved khichaddi,  Daliya,  stuffed idli with curd,  dal rice,  curd etc to ur little one.  Cook happily and make your baby healthy. 👍

Baby is also probably taking solids and taking fluids in the form of water which will aid the urination. At this age we look at weight gain, happy and active baby and for hydration only the urine.