:iagree:This Is what I do!That depends on how you re-add the water. If you are using buckets (which I assume you are not in that size tank) then you treat the buckets for the volume replaced. If you are using a python, you dose for total volume of the tank.
you should move the decor to vac under but you should not move the occupants..much more stessful than vac with them in tank.I have a 10 gallon tank. Should I remove the 3 neons, 3 ghost shrimp, Emerald cory, 2 ADFs, and the one surviving guppy every time I vacuum. Between the plastic plants and the plastic hollow stump, and piece of fake coral w/fake anemome thingy, there's not a lot of room, and I worry about stressing everyone.
Should I take the aquatic life and all that deco stuff out when I vacuum to better reach all the bottom area?
Still a newbie, but hopefully getting better at this.