Alphagrog 15KG Urchins Also known as the Green

Also known as the Green Mandarin

and as a soil amendment

Weir Dimensions (Including Comb) – 24 x 10 x 57

aquaculture

Rigid design with good resistance to ensure easy

Alphagrog 15KG Urchins Also known as the GreenAlphagrog is a volcanic rock, proven to be a successful filter media as it ideal for the colonisation of beneficial bacteria. The porous composition of this media allows the bacteria to multiply in abundance over a short period of time. The sharp edges of this natural rock require careful handling, and it is best situated in the last chamber of your filter, as you would not want your Koi rubbing against it! Remember to wear protective gloves whilst