vetteguy53081
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Known as stale ich, is more stubborn with treatmentThe recommended range for Coppersafe is 2 ppm on their bottle. it has been seen multiple times that a higher level is not really toxic and does a better job at removing ich. The dosing time is (as others have said) is 30 days - at that >2 ppm <2.5 ppm. This is whether you're treating a known outbreak or quarantining fish with no visible signs. using lower dose copper (as it seems you're trying to do) may induce some resistance - and may be worse than using nothing at all - though - I'm not sure there has been any proof (though its been stated) - that there is resistant ich out there because of using low-dose copper (perhaps @Jay Hemdal would know
. On this note, are there any reliable calculators for how much to dose? Manually tracking is minorly inconvenient lol. Im trying to get to the 2.2 without over shooting now and I’ve done:

I have a AI 16HD Prime for a coral QT right next to the fish QT though, with the lid it won’t fit. My basement door to the outside is pretty close to the tanks though so I feel like they get a decent amount of ambient light from that. Probably not the best but it’s what I got for now. I thought about just turning the whites on the Prime next to the tank for a little more ambient light.