Robelle 2810 Calcium Plus for Swimming Pools, 10-Pound (Discontinued by Manufacturer)
</br></br>
<div style="text-align:left">
<b>[Product Information]</b><br>
<ul>
<li>Increases Water Hardness</li>
<li>Low calcium hardness level can cause corrosive water</li>
<li>Prevents the staining or etching of your pool's surface</li>
<li>Ideal Calcium Hardness range 200 - 400ppm</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='//agdetail.image-gmkt.com/m430/054/920/840920054/img/agdetail.image-gmkt.com/054/920/840920054/img/ecx.images-amazon.com/images/I/51rj0clhObL.jpg'></br>
<img src='//agdetail.image-gmkt.com/m430/054/920/840920054/img/agdetail.image-gmkt.com/054/920/840920054/img/ecx.images-amazon.com/images/I/51cBA9RjuGL.jpg'></br>
<img src='//agdetail.image-gmkt.com/m430/054/920/840920054/img/agdetail.image-gmkt.com/054/920/840920054/img/ecx.images-amazon.com/images/I/51g7P98msfL.jpg'></br>