Nutrients are less like high school chemistry and more like home economics. It's a recipe, not a formula.
Think of it like making chili. Some people like really hot chili. Some people don't want any heat at all. (Heat is the total ppm in this example.)
If someone gives you a recipe for chili, you don't just dump in a ton of hot peppers because the recipe calls for that. You put in the amount you think you'll like, whether that's more, the same, or less.
The smart cook always starts out less spicy than they think they want, and adds more until they hit the right amount. It's easy to make chili spicier, hard to make it less spicy. Same with nutes.
Hi there, i am growing a single plant in a 15l pot; using coco professional and feeding it Advanced Nutrients Micro-Grow-Bloom. I have been following the back of the bottles with how much to feed but still don't 100% understand it all. My PPM always reads far more than the bottle says, even after adding the correct amount from each bottle.
What's the ppm of the water you're starting with?
That may be the cause. When they say the ppm will be X, they mean when you start with RO water which has very low (nearly zero) ppm. If your water's ppm is Y, the ending ppm will be X+Y.
I am at the end of my first week of flower and don't quite know how much i should be feeding her or how often. I now understand you shouldn't be feeding it every time with you water it, using the whole amount of nutrients specified on the bottle for the entire week rather than every time you feed it. Could someone please advise me on what i should be feeding her.
It's already been said, but the easy answer is that if the plants are happy and healthy, you're doing fine. Sounds like you're feeding your plants about the right amount.
One easy way to get answers is the Tech Support number on the label. Advanced Nutrients is good about giving advice and they don't even care whether you're using their products. (They might suggest you buy them, but no big deal there, it's part of their job. Like the guys at McDonalds who always ask if you want fries with that or whatever.) They've always been really helpful to me.