First off, let me apologize for the length of this post. I wanted to be as thorough as possible. I am having a problem with algae in my 5 gallon betta tank. About 6 weeks ago, my betta passed away. I decided to upgrade his old tank to a planted tank. When he died, the tank had some algae growing in it. I gave it a good cleaning and put everything back together. I did not change the filter media, and I was feeding the cycle with pure ammonia. At the time, I was using the incandescent bulb that came with the tank. I upgraded the lighting to a screw-in compact fluorescent (10 watt, 6500k). I ordered some plants (brazilian pennywort, java moss, and a marimo moss ball). I found a new female betta, and added her to the tank. Within 2 weeks, the moss ball turned white and fell apart. I removed it from the tank, as it had gotten messy. Then, I noticed that all the algae had returned. There is more than one kind. First-I noticed this yellow dusty stuff on my gravel. Then, there was this brown algae growing on the glass. Then, this green algae in various places. Finally-this black algae growing around the rim- I perform 50% PWCs weekly. My light is set on a timer for 8 hours a day. The gravel is vacuumed every 2 weeks. I feed my betta 6-8 Hikari Betta Bio-Gold pellets a day (these are split into 2 feedings), so I don't think it's overfeeding. I do not use any CO2 or ferts. I checked my water parameters today-they have consistently been 0,0,5. I have hard water, and the ph is 7.8. Temp is 78 degrees. This tank has been running for over a year. What should I do to get this to clear up? Should I add fertilizers or something like Excel? Perhaps a nerite snail? Any advice is much appreciated.