If you added via the sock method in front of a return (recommended) - clean them whenever you want.
If you added directly to the skimmer (not recommended) - it can take up to a week to fully dissolve.
 
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If you added via the sock method in front of a return (recommended) - clean them whenever you want.
If you added directly to the skimmer (not recommended) - it can take up to a week to fully dissolve.
I added in a sock and put the sock in the skimmer and periodically I go and squeeze the sock to help it dissolve faster. It fully dissolves in the skimmer before reaching the filter .