flower feed?

hi
just wondering a good feed (liquid preferred) to use in flowering stages?

currently used is biocanna from veg until week 2 of flower, then from week 2 - 6 using AN big bud.
in the final few weeks the leaves go yellow so im wondering whats best to use to keep it healthy n green? can biocanna be used in flower? the tin says "for the growing stages" so im assuming its just veg??

I have never used biocanna but im sure its not much different than what i use.I use flora three part series and use them all the way through the grow as my base.I use additives that are used all the way through the grow as well,but when it comes time to flower i use Monster bloom from week 1-week 4.At week 4 i flush all the monster bloom out and with the same nutrient base and additives but i replace monster bloom with Nutriplus Final drive from week 4- week 6 after week 6 i flush with water and Frost till week 8.Through this whole process (week 1 - week 8 )the leaves turn yellow and die because the nitrogen is cut back.If we kept the nitrogen levels up the plant would not focus only at bud production and would also make a very leafy product,and not create the desired bud formation.On the last 2 weeks of the grow when the flush occurs the leaves really yellow up because you are making the plant use up its stores of nutrients to produce a cleaner smoking product.If you dont flush IMO you get a chemical taste to the buds,and i dont know about smoking hydroponics nutrients in my buds
In bud you want the plant to yellow some its not a bad thing and is very common.if it happens in veg then you have a problem