WOW is the only word i screamed when i cam down this morning, to find the tank absolutely sparkling clean, the ottos i added along with a WC yesterday have cleaned my water of the green algae and have cleaned my rocks a little but too that was not expected this morning i shall get a picture tonight to prevent the annoying reflections that i get in the tank glass during the day, i can't describe how crystal clear it looks compared to yesterday if only i took a picture yesterday as the algae has all been cleared up i am going to buy some more red cherry shrimp this morning and move my amano's out back into there original home and i have also increased my lighting to 12hr day see how the ottos cope with that