Based on this product's specifications, here are some alternatives and similar models
Tabletka do szamb Microbec Ultra 20 g — BROS (single tablet)
Summary description:
Single 20 g Microbec Ultra tablet from BROS designed for sewage and septic tank maintenance. Contains concentrated formulation to support biodegradation of organic waste, reduce odors and help prevent blockages when applied according to instructions. Suitable for household septic systems and cesspools as periodic treatment to maintain biological activity and improve drainage performance.