https://www.chewy.com/api-kh-carbon...dxgbnvKKBoPvfTwdE_PK7iVyKv8aAj-SEALw_wcB

Here is a link to an aquarium alkalinity test kit, Strips are very unreliable. My kh is very low like yours. 0 isn't unheard of. Water/soil is very acidic in my area. Ag lime is needed to increase your total alkalinity. Fertilizer won't do anything with acidic water.


Scott Hanners