I have been fighting a battle with protozoans for several months. I seem to eradicate them completely after 30 days of daily Seachem Paraguard (malachite green) plus Ken's Metronidazole flakes, but the protozoans just come back a month later. I have a dozen tanks and this problem is is affecting one of my tanks. I was using these medications to preserve my biological filter, but I am tired of this guerilla warfare and I am now ready to drop the motherload on these protozoans.
Is copper based treatment still the best? If so, which one?
Is copper based treatment still the best? If so, which one?