I was very nervous about it, but i went with
http://www.twopartsolution.com/
and I can say that i was pleased with there service. Prompt delivery using our good ole faithful USPS which I love to see. Upon receipt I mixed up my elixers and have been able to move towards perfection with Mg,CA and ALK. It really is cheap if you dont buy store bought stuff. I was using the Bionic, nothing wrong with there product, I just got enough to do 2 years worth which would have gotten me about 3 month with the previous. If there are any concerns, check out
http://www.reefvideos.com/ and click on the one that shows the Dow flakes thumbnail. Everyone in this group may know this, but if there is one that dont i feel I need to mention it. Bottom line is baking soda, epsom salts and Dow flakes