Water Transparency - Help with Shader!

I bought a water shader package from the assets store and I wanted to make the water transparent but I'm having no luck figuring it out.

Here's the script I have:

 Shader "Water Flow/Water Diffuse" {
     Properties {
         _MainTex ("Base (RGB)", 2D) = "white" {}
         _MainTexColor ("Diffuse", Color) = (1,1,1,0.5)
         _MainTexMultiply ("Multiply", Range(0,5)) = 1.5
         _MainTexMoveSpeedU ("U Move Speed", Range(-6,6)) = 0.5
         _MainTexMoveSpeedV ("V Move Speed", Range(-6,6)) = 0.5
     }
     SubShader {
         Tags {"Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent" } 
         ZWrite Off
         Alphatest Greater 0
         Blend SrcAlpha OneMinusSrcAlpha
         LOD 200
 
         CGPROGRAM
         #pragma surface surf Lambert
 
         sampler2D _MainTex;
         fixed4 _MainTexColor;
         fixed _MainTexMultiply;
         fixed _MainTexMoveSpeedU;
         fixed _MainTexMoveSpeedV;
 
         struct Input {
             float2 uv_MainTex;
         };
 
         void surf (Input IN, inout SurfaceOutput o) { 
         
             fixed2 MainTexMoveScrolledUV = IN.uv_MainTex;
             
             fixed MainTexMoveU = _MainTexMoveSpeedU * _Time;
             fixed MainTexMoveV = _MainTexMoveSpeedV * _Time;
             
             MainTexMoveScrolledUV += fixed2(MainTexMoveU, MainTexMoveV);
         
             half4 c = tex2D (_MainTex, MainTexMoveScrolledUV);
             o.Albedo = c.rgb * _MainTexColor * _MainTexMultiply;
             o.Alpha = _MainTexColor.a;
         }
         ENDCG
     } 
     FallBack "Diffuse" 
 }

Please let me know if something needs fixing, because I can't figure it out.