how to ruin a bucket of salt

[lockrookie]

so awhile back i had accidently left the lid open on my salt bucket 3/4 full

tried tomix up salt and it was rock solid. so i crushed it up with a hammer andused it. since then the green filmm onm glass is horrendous. couldnt figure it out. so the lastcouple of days i have been mixing a new batch of salt from the same bucket. test salinity and my water is green.

my only conclution is the moisture in the air has seeped into the bucket has contaminated the salt thus giving it phophates and now is deemed usless. so please bewareandalways make sure you salt buckets are kept incool dry place and sealed.

or i could be wrong and something else has screwed me over but at this time this is my only answer