Is Kent Tech M magnesium still a useful supplement to use to eradicate green hair algae? I've read that they have changed the formula so that raising mag levels with this no longer gas an effect.
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+1I’m not sure it was ever suitable for that. Bryopsis was the historic use of it.

Just posted the link with the old (Kent Recipe) and it's a Brightwells product now.Try algaefix, it it works great, or fluconazole. I read the tech m mix was accidentally tainted with something and the recipe was corrected (Kent no longer makes the recipe).
someone has used it for GHA 

Well,I've been running gfo and carbon. Phosphates are 0, nitrates less than 5.


