I am new to pool maintenance. I had to drain my in ground pool and clean all the algae that was on the walls and refill it. So, upon adding all the chemicals recommended by my pool store, I got it back to it's opening stage I believe. My problem is when I added the Hardness, my pump no longer is working. It sounds like it's just on but I do not see any water rising to the top of the pool pump basket. It was working fine, full force, up until i added the Hardness. Did I clog it by adding that and if so, how do I unclog and get it back to working again? Help!