Nutrafin Phosphate Reagent No.3 Refill for Aquarium， 10ml</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Phosphate reagent #3 refill is for use with nutrafin's phosphate (0.0-1.0 mg/l) test kit</li><li>Phosphate levels should be monitored weekly</li><li>High levels of phosphate， often the result of overfeeding or infrequent water changes， can contribute to unsightly algae growth</li><li>Measures 1-inch length by 1-inch width by 3-inch height</li><li>Comes in 10-milliliter refill pack</li></ul></div></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br><img src='http://ecx.images-amazon.com/images/I/41PPo0NLGfL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/31aSNvgpLiL.jpg' noproxy></br>