All Fluval FlexSpec/Evo Media Fluval FlexSpec/Evo Media Fluval Ammonia Remover Insert Block A1333£2.99 Fluval Clear X Aquarium Fish Tank Filter Media Insert A1336£4.24 Fluval FLEX 15g. Black Foam Filter Insert Foam A1375£7.64 Fluval Nitrite Remover Insert Block A1335£2.99 Fluval Phosphate Remover Insert Block A1334£2.99 Fluval Spec III/V, EVO V, FLEX 9g Foam A1376£4.83 Fluval Spec/EVO/FLEX 3 x 45g carbon pack A1377£3.99 Fluval Spec/EVO/FLEX Biomax 42g A1378£3.51 Fluval Spec/Flex/Evo Replacement Carbon (3 bags) 3 x 45g A1377£4.59