Thats why im asking cause the site didnt make sense to me. What do you recommend for coral food?
If you have very low nutrients, I think products such as amino acids can be useful. I don't have a preferred brand.
Here's a typical problem I have with Brightwell claims. This one is not demonstrably wrong (as some are), but it is misleading, IMO.
This one for KoralColor:
http://brightwellaquatics.com/products/koralcolor.php
they claim
"Formulated specifically to provide trace quantities of elements for gradual incorporation into, and formation of, biochromes known to occur within zooxanthellae, such as chlorophylls a and c, beta carotene, and xanthophylls."
"Purified water, proprietary blend of major, minor, and trace elements known to be incorporated into biological pigments (biochromes). "
That all sounds quite impressive, until you realize that there are ZERO trace elements in chlorophylls a and c, beta carotene, and xanthophylls. Chlorophyll has a magnesium ion in it, and then every other atom in them is C, H, N and O. No minor or trace elements.
So what exactly is in this product?