Coral vital worked really well for me. I only used it for a short time to enhance the growth of my purple coraline algae. After that it spread liek wildfire and I'm pleased with the product. Granted I only used it for 2-4 weeks and then stopped but I liked it for the purpose I needed it for.
I havent started using it yet. A friend totalled out his tank last week and he gave me a 1 gallon container of this stuff with barely any used. I looked at some places online and the gallon cost over $100! Does it do anything other than help the coraline growth?