I am a newbie in aquascaping, a hobby that I engaged into last December 2014 after being inspired by a Youtube video from the Green Machine. I started reading forum threads on the basic setup, stocking, aquatic plants, fertilizers, and DIY carbon dioxide supply and was able to come up with something. I want to improve my current setup, which has the following details: Aquarium: Rectangular, 50 gallons Filter System: Box Type Lighting: Ordinary Energy-Saving Fluorescent Bulbs (Philipps, 4 bulbs at 18 watts) mounted on a rectangular DIY casing Fertilizer System: EI Method, CO2 Injected (DIY) Stocking: 9 Neon Tetras, 5 Swordtails (I plan to put 2 Zebra Nerite Snails as algae-eaters) Plants: Water Sprite/Wisteria, Moneywort, Christmas Moss, and some red-colored plants I bought in a shop (I forgot how it is called.) So far, everything is doing well except for the formation of some brown-colored algae on the walls of the tank. Please help me improve the setup. I would really appreciate some suggestions. Thanks!