I'm writing from Toronto, and we have had very unseasonally warm weather this last week (up in the 60-70's). I took off one of the corners of our cover to drain some water from the pool and noticed some green algae starting to form on one of the steps (it brushed off very easily).
The problem is I'm sure the temps will get back to normal and still below freezing at night, but I'm wondering if there is anything I can do to help prevent a real big algae problem from starting? I'm worried about adding chlorine without my pump and equipment hooked up to circulate the water (everything still stored in the basement). could I just add some chlorine and use a 2x4 to help mix it in, or just ignore it till I open next month?