What's the deal with Potassium?
Obviously, KNO3 and KH2PO4 include Potassium. So why do some people also dose K2SO4? Is the Potassium in KNO3 and KH2PO4 not enough? What are the pros/cons of adding the extra Potassium? And what's the best way to know if you need to do it or not?
55g: Finnex Planted+ and MonsterRay, Pressurized CO2 w/ Atomic inline diffuser, Eheim 2217, Eco-Complete, EI ferts. Lemon, Glowlight, and Black Neon Tetras; Harlequin Rasboras; Otos. Staurogyne repens, Hygrophila corymbosa, Ludwigia repens, Ludwigia glandulosa, Red Melon Sword, Wisteria, Water Sprite.