I am absolutely new to the whole fish-keeping aqua scaping thing. I would say I just started learning for 1 week. My tank is pretty small. Only 40x19x26. Right now I have 6 tetra, 4 cardinal tetra, 4 lamp eye and 3 pink danio. I may have overcrowded my tank a little. I am also going to get a couple of cherry shrimps. Have read that they can go with my tetra. I initially bought 10. Unfortunately 9 of them died because of my lack of knowledge which I feel awful about. Every time I scooped those that died I said a little sorry to them. I honestly felt terrible. My mistake was that I didn't let the water mature and I did a full tank change when I was doing scaping. Anyway, I have attached my picture. I am however, thinking of changing the plants on the right to a couple of moss rocks so my shrimps have something better to eat. I have tied a couple of Java Moss onto my log (poorly done.....). Hopefully they still attach well. Otherwise I am looking to change that as well. I do have 1 very important question that I want to ask. If I do plan to re-scape my entire tank next week, can I re-use the water that I have drained from the tank? Last thing I want is to do another full tank change and risk my fishes all dying. I have no CO2 and cooler, mainly because my area water is always at about 25-27 degree since we only have 1 season in Singapore, and my area is really cool. Thanks for any comments, and I hope to learn more as time passes.