I own brown moss type stuff coming out of my hot marine cistern within the loft.? Anyone any ideas what it could be and how to take rid...

Anyone any ideas what it could be and how to take rid of it?
My boiler won't work, 'Pilot'? Please HELP! My...
Answers:    Do you mean coming out the tap or in the cold wet tank within the loft?You need to be a bit more specific.
Should I use sheet metal or what else...
you obligation to put clororide in the container and clean the tap this will kill the mould ps dont drink the dampen or you will get sick