Agsil16H is a dry silica its agriculture quality, only need 0.7g per gallon and its what I and some other grow. Definitely the cheapest option and it’s the highest quality, just need to mix it for 5 min vs the bottled stuff mixes really fast.
K your right something is wrong.
What’s your light hours? What’s your DLI? (please give the thread a like, you’ll want to focus on the app section)