Man of fish said:Can you just slope the sand up from say the bottom left to the top right and if wanted flatten out the right side of the sand? Then add water to the desirable height
Man of fish said:I'm talking something like this.
----------------
| ____ |<--- sand
| ________ / |
| / |
|___water_/________| <--- sand
Not sure if that worked well but like slope the sand up and then flatten it off