This summer I made a bunch of mistakes on a 40gal I started. Well, I am planning to redo the tank in the near future. One mistake I think I made was too much lighting which lead to algae heaven. I have 192watts over 40gal which is nearly 5 watts per gallon. I cannot go out and buy another lighting system so I was trying to find other ways to reduce my lighting. Anyone know any effective methods? The only thing I can think of is to use duckweed... will that be enough? Another think I could do is use one side of the light until noon then use both for a few hours and then switch back... but I don't know if the whole tank will get enough light coverage with just one light. The front might not get enough or vice versa with only one side of the light. Also I could reduce the photo period... but will that help against algae? Thanks for the help.