Quoting Sarah Curtsinger:" maybe go buy a small tarp to keep it covered when your not using it....i am not sure about using chemicals in such a small pool."
Quoting Mother of One plus One:" Does this pool not have a drain valve?! It's hot as a son of a bitch,the pool is slippery,and by the ... [snip!] ... the pool. FML. Is there any way I can keep my water cleaner,longer? Its the rectangle one from walmart for like 20 bucks."You answered your own question.