I have never had any plants in my tank, and I was wondering if this was a good idea?? My tank currently has no fish in it because they go to my pond in the summer. However, I was looking for some plants for my 23 G tank which will house my Zebra Danios and maybe some guppies in the future. Are plants good for a tank? Must they be exposed to sunlight, or will artificial lighting do? What effects will plants have on ammonia levels, and other chemical effects??