Join Date: Oct 2003
Location: Toronto ON Canada
Some folks choose to treat with some malachite green formulation (e.g. Maracide). A couple of things to be aware of, should you decide to do that:
1. Tetras are quite sensitive to malachite green. Half of the recommended dose is suggested for them, if you use it at all.
2. Malachite green stains like crazy, specifically the silicone at the joins in the aquarium. If you don't want that to happen, then you could choose to treat ALL THE FISH FROM THAT TANK in a separate hospital container that you either don't care about, or can't stain. (Take the cycled filter along with the fish.) But if you do THAT, then you need to let the original aquarium alone for a while, so that the ich goes through its full lifecycle and dies out for lack of hosts. Since the original aquarium would at that point have no fish, you could help yourself by cranking the temp to around 85F. Any higher might be a risk to your heater. (Also malachite green will stain an Ammonia Alert sensor, if you use one of those, so make sure it's not in the treated tank.) Of course, you also need to complete the full course of treatment in the hospital tank, bearing in mind that at lower temperatures the lifecycle of ich is slower. Disappearance of white spots is not, in itself, an indication that you are done.
Please don't take this message as any whole-hearted endorsement of malachite green ... but rather some things to think about if you resort to that course of action.