I have 8 Gallon Tank with 8 Neon tetra and 3 plants. My water parameter is absolutely fine. My fish doing well. I am using Flourish liquid once a week.My substrate is ordinary small colouring stone. Now thing is that my plant was doing very well but suddenly it started becoming brown. No new leaves from 2 - 3 days. So I though may be because of algae so try to rub plant leave with my hand to see algae is stick but no it was plant leaves turn to brown. then I watch my wall is very little cover with algae and in middle of the tank when I see water looks clear but top layer water is brown and near the walls water is brown. So what I wanted to know is it brown algae. Did this will harm my plant how to rid of it !!! My friend told me that scrub wall with scrubber which we use for utensils. I wanted to know should I scrub the wall of tank when water is there or should I remove the water then scrub and feel tank with new water. I really confuse.