New and ready to learn!

Welcome to the forum!
It is very likely they are coming from your SWCG. It sheds any scale buildup each time the polarity reverses.
Do you have your own test kit? If your pool water chemistry is properly managed, there should be little to no scale from your SWCG.
I suggest you read ABC's of Pool Water Chemistry.
 
Welcome to TFP! :wave: Be sure to update your signature. See ours as examples.