Is my Flora Micro bad?

GHE themselves says that the shelf life of Flora (Flora Gro, Flora Bloom and Flora Micro) is indefinite if it's stored sealed in a "dry and cool place".

I have the three bottles (manufacturing date Sept 2015), and I use them for 3+ years already and have stored in a dark cupboard. (In case you wonder why they lasted so long, it is because I used other nutrients in the meantime).

Flora Grow and Bloom look fine, but Flora Micro has flakes in it which hadn't been there before. Of course I am always shaking the bottle like mad and also shook it on occasion as I stored the bottles. The bottles definitely didn't suffer cold, but high temps as I had them in a room without A/C. I do not notice crystals however, like the crystals outside the Flora Grow bottle around the cap.

Has my Flora Micro gone bad?

Are they sparkly flakes or is it chunky sediment?

Take one mL of it and add it to a gallon of water and check the PPM rise. It should be a 60 PPM rise for each mL added to the gallon of H2O. I have never seen crystals in micro and I have used it for 30 years.

Actually there ARE chunky solids in it (not sure whether to call them crystals, more like pebbles) along with reddish flakes which are floating when I dilute with water. (When I pour some in a clear jar, but only under certain light, I can also see very fine golden "sparkly" dust/solids floating)

The large chunky solids rattle and collect at the bottom. So, something is seriously off there.

I contacted GHE and they asked for pictures which I sent to them. They're checking with their quality department whether something was off with that particular batch, although the exact batch nr. of the Flora Micro bottle has become unreadable. (But I had the three bottles, and they were all about from about the same manuf date, +/- a couple or so weeks). Waiting for the reply from GHE.

Just get a new bottle, it's not that expensive.

Ok I just got reply from GHE.
They said that even if there are chunks or crystals, it shouldn't affect the use of it. (The only issue would be if someone is using it for hydro where the crystals might clog tubes). They also said it can happen that sometimes at the end of production it may happen that some more solids make it even into new bottles, but this too shouldn't affect the product at all.