martiniduck
Aquarium Advice Activist
I have a 100 ft Python and I have noticed that black spots have formed in the hose in spots. I am thinking it is mildew. I cannot get to it to clean it out, the hose is too long for that. I have tried to run hot water through the hose to clean it. That did not work. Anyone else see this happening to them? Is mildew harmful to fish?