All through the flower. BigBud or liquid KoolBloom

my first grow ever need to purchase one of these tonight. i have a perpetual set and cannot time specific intervals for nutes because all plants are in the same tray. so....one of those will be run the whole way through flower. also, is it really necessary to run a sweetner? alot of people say its not necessary and should taste great without. ps..the big bud would be powder and koolbloom is the liquid one. my base is dynagrow bloom. thanks guys

IDK which 1 to use but look into Bud XL as a substitute for a sweetener. I start using it week 2 and I honestly wouldn't see a problem using it all the way through flowering. Not many nutrients are used all the way through flowering and that is the problem with perpetual. H&G recommends using it week 4 but I have seen them also say to use it first sign of bud sites. What it is is an Enzyme that instead of adding sugars to the plant it used the sugars/carbs the plant naturally makes and has stored in the leaves/stocks etc. and moves those sugars/carbs to the buds. I love Bud XL and believe it would be something you could use the whole cycle.