Originally Posted by houseofcards
What in your opinon is the connection with the no3. I basically subscribe to the EI method and didn't thing the no3 was an issue.
The Green Water and other types of algae, will feed off of fertilizers just like the plants. While stopping ferts may stop the gren water, it will probably also stop plant growth and lead to other types of algae growth. GW can be induced by NH4 (ammonium). Once established, it hangs on for a while. To remove it you can:
1) use a diatom filter - Costs $ unless you have a filter
2) blackout the tank for 3 days - do a search on blackouts for specific directions - Blackouts are free!
3) UV filter the tank - $ issue again
4) try the Willow method suggested in this thread- free if you have access to willow branches and if you can get it to work