Lime deposits are scaly. If they are colored, the color came from something else.

It could mean copper, but probably won't be a problem for your pool. Go ahead and follow the original recipe, but when you add your first dose of chlorine, use only 1/2 and watch for any color change in the pool water. If there's no change after 30 minutes, go ahead and add the 2nd 1/2.

However, if you have a skimmer, add the bleach through it. (Pump running!)