I know the guy that started the company and my boss used to develop products for them. If you really want a good product, go with the Brightwell Aquatics stuff. A guy high up in the food chain from Kent broke off and created his own company, it's all the same stuff, but Brightwell is much much more concentrated than Kent's products. It's very comparable in price, but instead of using 1 capful per 10 gallons of water of Kent's Calcium product, you use 1 capful for every 25 gallons for the Brightwell product, I've used every BRightwell product out there. I get them for free because I have a pretty good relationship with the representative for them, so if you have any questions about them let me know.
Kent is a great brand, but there are better ones out there.
A product similar to Coral-Vite is Koral-Accel (or something like that) from Brightwell, that is what I would recommend to a customer at my store.
