Think they changed the formula as i have gone through 5 gallons on my previous tank before restarting. Another new new development is fluconazole that's been killing bryopsis.By the way, back in the day, a dose of "Tech M" magnesium was known to kill of briopsis. It wasn't the magnesium that did it, as other supplements didn't work, but there was some impurity or specific ingredient of Tech M that would kill it off. Not sure if that is still true (if they changed the formula).
V
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