I got in some new driftwood and plants that I plan on adding to my 54g corner tank today. The tank is 24in deep so it's much easier to plant and scape with about half of the tank emptied but i'm worried about doing such a large water change at one time. I have 2 dwarf gourami and 1 rainbow shark in the tank (lost 2 angelfish yesterday that didn't make it a week unfortunately) and obviously the health of the fish are much more important to me than adding plants. Anyone have any thoughts or recommendations? I'd hate to endanger any more of my fish due to my lack of experience. Thanks in advance.