Aqua Ultraviolet® Classic and Twist Series In Line Transformers Magnetic Drive and in the winter they LA7475 DappleGrey BlackPebbles and in the winter they help break down fish waste and prevent pond surfaces from completely freezing SKU UPC Code Description Compatible BioTec Filter 4 5 10 12 18 30 36 54030 706759540308 Red Filter Foam X X X 56739 706759567398 X 40977 706759409773 X X 54031 706759540315 Blue Filter Foam X X X 56738 706759567381 X 40978 706759409780 X X 10648 706759106481 Screenmatic Transformer X X X 11613 706759116138 Inner Body Lip Seal X X 25351 706759253512 Filter Box X 19224 706759192248 Foam Holder X X 19506 706759195065 Flat Gasket X X X X 22279 706759222792 Drain Seal X 45196 These replacement parts and accessories are for various Aqua Ultraviolet® UV Sterilizer Clarifier units Black A40002 617750400020 Lamp End Connector