it is
. All brix is, is a measurement of how much sugar is stored in a leaf, or the entire plant for that matter. Sugar is a product of photosynthesis.
So the more photosynthesis taking place, the more sugar.
Anything can interupt photosynthesis. A light failure, improper watering, bad ph, nutrient deficiencies, etc. What promotes it, other than light, which drives it, is the amount of carbon, oxygen, calcium, phosphorus, and microbes to process it all.
So if you have high brix and an issue, like my light crashing, then photosynthesis gets compramised and sugar stops being produced in excess, and the plant starts to draw sugar from the leaves and brix drops.
When you fix the problem and start producing sugars again you need to 1st support yourself, and then start paying the sugar bank back to see brix rise again.
Its something you really want to stay ahead on. Over 12 is A-OK, but you have no buffer for an Oopsie. I strive to become over 12 as early in the plants life as possible.
Carbon often gets overlooked in the early stages. The carbon a plant feeds the microbes is from CO2 in the air. We all know plants breath CO2, but what most fail to realize when starting out in organics, is that microbes eat carbon.
Its their favorite food.
They can't eat CO2 in the air, they need it from the soil, so you need raw carbon in your soil for the microbes until the plant gets over 12 and can start feeding carbon (sugar) to the microbes. Like priming the pump, so to speak. Healthier microbes means more food, phosphorus in particular.
Coco is excellent carbon. It's density is perfect. Perfect carbon raises brix quicker in a plants life.