New Posts New Posts RSS Feed - Algae growth in hot water heater tank
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Topic ClosedAlgae growth in hot water heater tank

 Post Reply Post Reply
Shaun Frazer View Drop Down
Direct Link To This Post Topic: Algae growth in hot water heater tank
    Posted: 20-Nov-2004 at 8:31am
Any help you can give would be greatly appreciated.

My water tank is c. 8 years old. When the water is heated to a sufficient degree, a browny/green algae is present in the tap water. This is most common when I heat water through the electric immersion heater however I presume the algae is always present but only stirred up when the heat is sufficient within the tank.

Is this a common occurence and can something be added to the water to kill the growth and sterilize the tank. Or would the simplist thing be to replace the tank?

I'd appreciate any advice as this is an area I'm unfamiliar with.

Reply either here or through my email at


Back to Top
rescuemn View Drop Down

Joined: 20-Nov-2004
Location: TERRA
Points: 3
Direct Link To This Post Posted: 20-Nov-2004 at 3:15pm
Your problem could be lack of a dialectric union between the coper line and the water heater. The electrolysis allows sulfites to build up which allow for the growth of algae that like to feed on them. Either a dielectric union or a 6 inch brass fitting to get rid of the electrolysis may fix your problem.
Back to Top
nicktheplumber View Drop Down
Senior Member
Senior Member

Joined: 09-Jan-2003
Points: 463
Direct Link To This Post Posted: 21-Nov-2004 at 1:26pm
I have never heard of algae growing in a water heater tank. The temperature is way to hot to support the growth of algae. You may have "green stuff" discharging from the hot water lines to your fixtures, but I'd be surprised if that stuff was algae growing in the heater tank.
Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down