AlfaGrog is an porous ceramic material: strong, tear resistant and relatively light. AlfaGrog is PH neutral and doesnt r...

AlfaGrog is an porous ceramic material: strong, tear resistant and relatively light. AlfaGrog is PH neutral and doesnt react with other chemicals. it has a huge surface area for the growth of micro organisms when you compare it to other materials.

Latest development in moving bed bio media.

Largest surface area of all biorings! Total area is 955 m²/m³, protecte...

Latest development in moving bed bio media. Largest surface area of all biorings! Total area is 955 m²/m³, protected area is 955m²/m³!

Sera Siporax Pond 15mm 50Liter