okay so i have a planted 55 gallon, and i'm having a lot of trouble with fish digging up plants... the biggest problem is that the fish move the gravel around the tank making it easier for the plants to me uprooted.. so what i want to do it get a 6 foot piece of acrylic thats 3-4" tall and put it in my tank... separating the rest of the gravel which will be 1" thick... besides acrylic is there any other material i could use... or any way i should approach this.... ?
below is my idea for doing this

below is my idea for doing this
