Quote:
Originally Posted by sphelps
Look into Dow Flake, it's 99% calcium chloride and many people have used it in their reef. You can get a huge 20kg bag for like $20.
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^^^ +1, with a MSDS indicating between 60-100% purity you just can't be sure of what impurities you will be adding to your tank. No point saving $15 on bulk additives when you could possibly kill $1000's of dollars worth of coral.