Nutrafin Phosphate 0.0 to 5.0 Mg/L for Fresh and Saltwater， 75 -Tests</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Suitable for fresh and saltwater aquariums to measure phosphate levels (0.0-5.0 Mg/L)</li><li>Phosphate levels should generally never exceed 1 Mg/L</li><li>Allows you to easily test phosphate levels</li><li>Helps in the prevention of algae growth</li><li>Easy to follow directions; Contains 75 tests</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/41YDtkfHRpL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/51Y1Y5T7AEL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/31AfQux4FqL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/51qh1eDw6iL.jpg' noproxy></br>