Topic: how many feeds per week

hey guys, im new to green planet but have been growing for around 15 years now. no stranger to it at all. i’ve recently started using the GP3 part formula. every other nutrient i’ve used, i’ve only fed once per week. but every other nutrient i’ve used uses about double the amount of nutrients in a drain to waste schedule. im using promix coco potting mix so it’s a soiless mix. should i be feeding twice a week or just keep it to one?

on another topic, i have a lot of left over powder additive nutrients from another company. they’re basically bud booms with huge amounts of P and K to boost flower production. are these ok to add along with the 3 part formula? i also have the additive like Resin, Massive Bloom, vitathrive, and liquid weight. but none of the additives have much if any npk so i assume they’re just all beneficial and micro nutrients. but i assume it would be ok to add the additives, i usually go a bit weaker than the package says too to avoid tip burn and such.

thanks for the time!