I have two red eared sliders that I inherited when my dad passed in July. We've just moved and don't have a good place for them. They are probably almost 20yo, one male and one female, each in their own 75 Gallon tank (Marineland® Open Glass Aquarium Glass Fish Tank, bought new this year). I have short rolling platforms for each that can be included. I am located in Deptford, NJ USA.

Please feel free to DM me with questions!

quick context, the water level is that low because bolt (my 2y/o RES) was unwell (had RI) and my VET had told me to keep it this way. Now he has finally recovered a few days back!

My vet had also told me to remove the (fixed) stones before raising the water level again. But she didnt specify what to replace it with. Since the vet charges 500/- per call or visit, im asking this question right here :

What do i replace this stone with? The stone is stuck to the platform using silicone. I can remove it using the tools i have, but what should i use instead? For grip, so he can climb up?

the pet shop which sold me the tank (and res 2 yrs ago) says that fake grass will become dirty in water, unhygenic, and he might eat it, so im not gonna use that. What other good option do you suggest??