Help!! Black Mold spots on my hoses

[kcinimod]

I bought two new Rena Hose replacements. Within a couple of weeks, what appears to be black mold spots started to form on the inside of both tubes. I have other XP's hooked up to the same tank w/no black spots at all. Anyone every experience this w/new hoses?

 

[alexmuw]

My brother has a RENA XP3, so I'll have to check with him; but maybe the black spots could be algae?

Good luck!!!

 

[gomezladdams]

Its algae.Harmless just ugly.

 

[zspidel]

i got the same deal on my xp4. its a newly set up tank and ive been fightin algea. havent had time to clean the hoses yet. what a pain!!!!!