I will only comment about the FROG since one of the companys I install for used them for years. Make sure you have an anti siphon valve between the FROG and the filter. Make sure your return jets into the pool a little straighter than what might be normal. You do not want that high concentration of chlorine coming in contact with the pool liner until it has been diluted.

The only other problem you will have is the chlorine will eat your plumbing three times as fast as without it. Just some things to keep an eye on.

I think the real reason for selling the FROGs is it keeps you coming back to their store for replacement packs. Just my thought anyway.

Later, Dennis