10 Wooden Poles/Metal Supports
Fill the tank with water
Position a piston above the surface of the "low-tide" water at a corner
Program the piston to move slowly into the water with a weight joined to it
This will increase volume in the tank causing the "low-tide" to rise into "high tide" due to the extra volume of the weight inside the tank.
1 Pipe (7 cm diameter +-)
1 Water Pump
Fill both tank with water, Let x be the water pool and y be the tidal simulator tank.
Position one pipe connecting two tank at the bottom, leave it alone
Position a pump, which allowing water to be pumped from y to x.
-Start of with y having lesser water than x in a ration of 1:3.
-allow the water to leak through the pipe from x to y, using water pressure/gravity
-Once both water levels are equal, y is considered to be "high tide".
-Slowly, pump back the water into x using the pump. (pump is programmed)