I had a 20 gal tank some 20 or more years or so ago, and everything was artificial except for the fish. Due to the constant need of maintenance I gave up a year or two later. I am now retired and older then dirt myself. Anyway, I am now the proud owner of a 29 gallon tank that has been up and running for a month with satisfactory results for the most part. There is still so much to learn though. I know I wanted to have live plants, and realize that fish waste can aid in the fertilization of the plants. Anyway, after watching a lot of youtube videos on the subject I decided to start by using an inch or so of pre washed organic potting mix, topped off with two inches of pre washed play sand purchased from Home depot. I then added the water, along with the back filter, heater, Etc. I then added more sand and destroyed my filter, which I replaced with a sponge filter rated for a 40 gal tank. Again so far so good. I then added eleven assorted plants, and nine small fish I bought at pet smart. I have no idea what the names of them even are. Again, so far so good. I feed the fish brine shrimp rather then the processed flakes, and am careful not to over feed. Anyway, I am now seeing some brown haze on the top of the front glass closest to the light, and two of the plants are developing a black color to a couple of leaves. I believe it's a form of algae. I did order yesterday fifteen verities of plants so I can plant a lot heavier, and hopefully that will help solve at least part of the algae problem, but not sure, just hoping for the best.------My appreciation to the moderators for allowing me to be part of this forum.