Found their web site and this is the info they provided............which is nothing. I would be skeptical about a manufacturer that provides no nutritional or ingreedient info on their web site. Maybe I missed somthing but I couldn't find it. IMO the extra money spent on the NLS is worth it. I have 6, here's a couple of pics raised from ~1.5" on NLS.
http://hbhpet.com/consumer/products...page=flypage.tpl&product_id=28&category_id=12
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Thanks. I did pick up the NLS, but I will get the 2mm next time. They do like it a lot, so I'm hoping it helps bring out their color more.