I just did it. Added, like timerguy said, about 2 lbs. Put a cable tie on it, and put it in the basket. left the other basket (skimmer) empty, just to be sure flow isn't an issue, although I have two main drains too. So I'm not worried about that. But here's some pics, one with the pump off, and another running (plenty of water movement/flow).


I'll check it later tonight to see how quickly it dissolved.


I'll check it later tonight to see how quickly it dissolved.