Green Water and CO2
 

"Shawn" wrote in message
...
No - I'm not sure I need it ! I don't know what the h*ll I need anymore !
My green water algae outbreak is driving me bonkers. I saw a post a few
days ago from someone saying to dose with 1 tsp KN03 every other day to
get
rid of it.

Okay, first of all, do some tests (or get your LFS to test for you).

The important numbers are nitrates, iron and phosphate.

Nitrates should be under 20ppm, iron under 0.1 ppm, and phosphate as close
to zero as possible. Assuming one or more is higher, you need to reduce
them.

Reduce nitrate and phosphate by daily water changes of 10-15% I don't
expect that your iron will be too high but if it is, water changes will fix
that too. It may take a while for the water changes to reduce levels
significantly, especially if they're high to start with.

Once the water chemistry is right, the green cloud will dissapate itself
after a week or so. If not you could use a floculant to cause it to drop to
the tank bottom and vacuum it out.

Graham.