I have a 10 gallon tank with 2 adult guppies and some fry and a 20 gallon with 2 adult mollies, 2 juvenile mollies. I see all the other tanks that look so wonderful on here and then I look at my tanks. They are as fake as you can go. I want to make drastic changes in them but I am honestly, quite hesitant. I do Not have a green thumb so to speak. And quite frankly...I have killed an air plant. I would like to start with my 10 gallon and change it all around. I am just not sure where to start. My substrate in the tank is blue gravel approx. 1/8 inch size. My Ph is 6.8. And i currently have 2 25 watt bulbs in the lid that run about 6 to 8 hours per day. Other info if needed...tank has been established and running for almost 6 months. I do weekly water changes of about 25% and test my water with api liquid test kit. Readings are 0, 0, 40. Any thoughts for someone alittle hesitant to venture this way?