Bajar ph sustrato

"i prefer to avoid acids that also add nutrients. This could impact how much of a particular nutrient product you add, too." to be clear, that was only in reference to what you add to adjust pH of water.... as far as ph adjusting your soil... that will inevitably involve nutes of some proportion. this will need to be considered as you adjust fertilization to match.

Vitalink easy ph down is a decent cheap product and not to strong.

There are quite a few natural ways in which you can reduce the pH of garden soil over time. Using organic materials like well-decomposed compost, compost tea, elemental garden sulfur, mulch, coffee grounds, and sphagnum peat moss in your garden can help lower the pH of the soil naturally. Two materials commonly used for lowering the soil pH are aluminum sulfate and sulfur. These can be found at a garden supply center. Aluminum sulfate will change the soil pH instantly because the aluminum produces the acidity as soon as it dissolves in the soil. But imho you shouldn't bother acceptable pH range for soil is 6,2 to 7,3 so 7 is fine. https://planetpermaculture.files.wordpress.com/2013/07/soil_ph_nutrient_availability.jpg?w=840 Happy growing