Cal-Boost from Canadian Tire

[Zoaelite]

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.

^^^ +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.