I have these wedding cake style steps-
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They are large but are hollow & open underneath so
I do move them to vac/brush under them occasionally otherwise I will stick the vac head through the hole that is in one of the steps for a weight to get anything that’s gotten under them. I am usually able to brush behind them with them in place as well.
During pool season The hand rail is screwed to the deck.
With the handrail disconnected I can move them around in the pool with some effort even with the weights attached.
In the winter I leave them in & just remove the handrail so I can put my cover on. I’ve done this for 5 years.
We do get very cold temps here (near zero F) but not for really extended periods of time so ymmv with this practice up north.
At the beginning & end of the season I pull them out and scrub them down then put them back.
Whichever style steps you choose you will likely need to weigh them down to prevent movement/floating.
Do NOT pour sand directly into your steps - no matter what the directions say.
#1 it will make them very hard to get out and its very hard to remove the sand to do so.
#2 it will become algae city

*Any weight you use should be completely sealed so algae cannot grow
*Multiple smaller weights are preferable over 1 or two very heavy weights as they are easier to handle with 1 person.
Examples:
Sealed bottles filled with sand or concrete (some people use old bleach jugs- you’ll want to seal the caps, they also sell collapsible jugs - just google step weights)
concrete/sand filled & capped pvc pipes, actual plastic weights that are completely sealed (like you put on a barbell) - i have 40# worth of these hanging from inside my steps.
Depending upon which steps you choose you may need to modify them so they get adequate chlorinated water flow. Or alternatively seal them up more completely.
I drilled lots of extra holes in mine without affecting their integrity. These holes allow me to stick a brush or the hose in them & clean them while they are in the pool.
Mine have little rubber suction cups on the bottom so they don’t harm the liner.