Can you explain how it kills algae? Does it contain algaecides? I'm
ordering some tomorrow from Foster & Smith but the catalog doesn't mention
it killing algae.

To be an "algicide" it has to pass, like 10 years of FDA testing
so if you ask sea-chem it it's an algicide they have to tell you
no of they're breaking the law.

If you ask them if it will help grow moss balls which are
cladophora algae they'll tell you this is not advisable,
it will hurt it.

I don't know how or why it works, but it works better than
conventional (FDA approves!) algicieds like simizine IMO.

With high lights, good ferts but no CO1 you may get algae.
Add Co2 and the plants can us all those nutrients, similarly
so Excel provides organic carbon and plants grow better with it
than without it. And it does knock algae out in a day or three.


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