I found this at Menards last year and it was great! I am planning on using it again this year:

Qualco Inc’s Pool Aid “Hygenic Powder for Kiddy and Wading Pools”.

It comes 6 packets to a box ($3.09 retail). We sprinkle a 1/3 packet in the wading pool every few days. There are instructions on the back of the box for different size pools. The powder keeps the pool water sparkling clean. All you have to do is use a skimmer to fish out any big debris that finds its way into your pool. You won’t have to change the water as often and you’ll know its clean and safe.

I tried to find a link online for the product and could not. The company’s website is www.qualco.com. They have an email form, if you are looking for the product in your area and cannot find it.

No more slimy pools!