I usually run what I call a ‘hurricane session’ on most tanks about every 2 years. It makes clients happy because it’s a new look, and it helps me manage corals and remove any fish that have become problematic.
The typical protocol is to pump 90% of the water into bins, and place corals and fish in them. Then I pull whatever rock doesn’t have much or anything growing on it out and place it on a tarp so I can see what I have and start to map out the aquascape in my mind.
Then, I shift and stir the sand bed up, and then once whatever junk is in the sand is in suspension, I push the sand as far over to the corner as I can. I then pump the remaining 10% of the water with all of the crap out.
Spread the sand back out, lay down what I can of the aquascape, and then fill the tank back up with the saved water, adding coral as I go (a lot of times I’ll place them on the bottom until the tank is filled and I’m ready to start placing them).
Refresh the carbon and some Purigen, plug it back in and it’s like nothing happened.
There is almost always a noticeable uptick with the corals afterward.