I use a product by Natural Chemistry called Pool Perfect plus Phosfree. A lot of smarter people on this board would tell you that you do not need it which is probably very accurate. I buy it online for fairly cheap and it, plus proper pool balance, has kept my pool algae free since it was built in the Spring of 2005.
Posthemmorhagic anemia. causes acute anemia through the sudden loss of blood with normal iron stores. Hemorrhage can be obvious (e.g., bleeding externally from an open wound or hematemesis) or hidden (e.g., internal bleeding into the thoracic or abdominal cavities).
The most common cause of microcytic hypochromic anemia is iron deficiency, though there are other causes. Futher investigations would normally involve checking serum iron and total iron binding capacity-these would determine if the cause is iron deficiency or otherwise.