Reduces carbonate hardness and pH value, prevents growth of algae, adds natural humic substances: active peat pellets for the use in aquarium filters Use: wet 24 hours before use, decant carbon into net bag, embed into the filter Two peat components with different humic substance content: fast initial effect, well dosed long-term effect. Prevents algae growth: very light amber water colouring Ideal keeping and breeding conditions for fish from blackwater habitats Contents: 1 pack active peat pellets. Incl. net bag and clip - diameter per pellet approx. 16 mm, length 15-25 mm.