Hello, I have had my tank since August 2009. I am new to all of this!! SO I need some advise. I have lots of uestions: 1. What can I use to clean the inside glass of the tank? 2. Everyone is talking about water changes. I have only added water to my tank thus far. How often should I be changing the water? And I use the Tetra Safe water conditioner, do I add enough for the amount of new water or enough for the entire tank (10 gallons)? 3. Filters.....I was told that once a week I could pull the blue filter out and rinse the filter. Is that enough of should I be doing something else? 4. Everyone is talking about "testing" the water, and "cycles". I don't test my water thus far. How important is testing, and what product should I get? 5. How many fish can I keep in my tank? Of the fish that I currently have only two have much color. People that look at my tank only think I have two fish. BUt really I have the 2 Platy's / 1 Zebra Danio / 3 Neon Tetra / 1 Skunk Cory Catfish. I want my atnk to look beautiful and colorful!!!!! Thanks for any help that I can get! This was my sons present but I have become the one that is getting really involved in this tank!!!