Aquasonic

Bactonex assists in the prevention of bacterial, fungal and protozoal (Velvet, whitespot, chilodonella, Trichodina & Trichodinella) infections ...

Assists in the treatment of whitespot in all freshwater aquaria. Assists in the treatment of whitespot, ectoparasites on skin and gills, fungus and...

When fish suffer stress their immune system is affected and can lead to white spot and or superficial Fungal invections.  Also if you are hatching ...