Red Sea’s colorimetric Phosphate Marine Test kit provides a quick and reliable measurement of Phosphate in your aquarium to an accuracy of 0.1ppm PO4.
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Eheim Flexible Brush Set (4009560)
Set Includes 3 brush heads for cleaning tubing sizes 9/12mm, 12/16mm, 16/22mm, 19/27mm and 25/34mm.
Also suitable for most other makes of filters and pumps.