NeoKusa pH‑Down Micro‑Acid – Gentle Citric pH Control for Aquariums, 100 mL

25% lab‑grade citric acid for precise pH reduction. 1 drop per L lowers ≈0.01 pH at low KH. Sodium‑/phosphate‑free; shrimp‑safe within label. Pairs perfectly with NeoKusa KH+ for fine control.