Aviel- I noticed you wrote that you tried to blackout method. I have found this method with hydrogen peroxide to be the most effective. **The key is to make sure that no light is entering the fish tank**. This can be accomplished by covering the tank with towels or blankets. This is how I approach this method: 1) If the tank is established then run a large water change (>30%). If it is not established then change as much water as you feel comfortable (ie. 15%). 2) Cover the tank with blankets and leave the light off. 3) Add hydrogen peroxide to the covered tank (~1 oz. per 10 gallons). 4) Allow the tank to sit for 2 days with no light access. Most of the algae should be dead. 5) Check on the tank to make everything is ok, and determine how much algae is still there. If gw still exists then make another water change and repeat the steps. **Make sure that the plants don't go too long with hydrogen peroxide and without light. Maximum should be 4 days. I have used this method quite effectively recently for my 58 gallon tank. It took 3 days to clear the gw. HTH, David __________________________________ Do you Yahoo!? Take Yahoo! Mail with you! Get it on your mobile phone. http://mobile.yahoo.com/maildemo _______________________________________________ AGA-Member mailing list AGA-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/aga-member