Last year we were informed that club members could buy from Bulk Reef & receive a discount on their prices. I've used Seachem for years & had tried several other brands as well. I have never been able to achieve the polyp extension or growth in my tank that I wanted and have never been able to have any colaline algae grow in my tank. Shortly after trying the Two Part, I began seeing improvements. It has now been a year & my coral growth and colors exceede anything I ever had.
I use Prestone drive way heat de-icer for calcium and baking soda for alkalinty. I have been doing this for three years. I get the Prestone from Lowe's. A lot cheaper even than bulk reef supply. No ill effects at all.
