Aquascaping My Tank

You can do it with your fish in the tank as long as you are careful not to bury them or anything like that. If you post a pic and say what you have/want to do, maybe I can give you some tips.

Well, if you really want to re-use all the stuff in there - I would move the two tall plants in the middle over into the left hand corner behind the barrel. This will balence with the other side more which has a taller, more massive rock thing (? - is that a fake rock cave?)
Maybe pull the barrel foward and right a little to make room.

I wouldn't put more stuff in there, it will look too crowded. Balance between right and left instead of a "centerpiece" object. With the middle opened up, the fish can become more of the focal point.

Also, consider changing the background to a solid - maybe black. The tank will look less busy and the ornaments and fish that you have now will stand out more. And the blue gravel will really pop!

Hope this helps - post again when you redo!

I think it looks good as is.

Maybe the cave thing in the center and the plants more bunched up. You can move stuff around with the fish in there, but as posted before, just be careful that you do not bury any fish or pin them under or against anything.

I move my fake plants around once in a while. mostly when vacuuming gravel.

Nice tank, I think it looks good.

edit:

I think some flat rocks like in the backgound would look cool in the tank.