Man it was an amazing transformation I've never seen anything like it. The tank looked like new with even the leaves and glass clear of any algae. How did this happen? How did the algae vanish from every part of the tank it's beyond my wildest expectations. Was just waiting a couple of days before I responded because it looked too good to be true and I half expected to see it return within 24 hours. Need to keep it like this now don't know what caused it that's the problem.Thanks for all your help. B