I have a sick dogface puffer! He has ich I think. I treated with weco nox-ich (Malachite Green) after being recommended by a local fish store. Seems it didn't work or only provided temporary relief. Gave him a FW dip two nights ago. Hoping it's ich and not velvet. Would prefer to stay away from copper if possible. He is the only specimen in this tank. I tried to give him some Astrea from LFS without QTing them first. Big mistake. He is flashing pretty consistently. Also hiding a bit more and his appetite is up and down.