Tang Splashing

[Johnny Reefer]

My Powder Blue likes to splash at the surface. At first it was just along the back. I spent $100 getting some 1/2" plexi custom cut to cover the top along the back. Problem solved until the other day when "Splashy" decided to pull off it's antics at the front/right side. This is not good as my stove is right there.
I am wondering if anyone else has experienced Tangs splashing at the surface.
Is this a common trait for Tangs, or is my "Splashy" somewhat unique?
If it keeps it up I'm thinking of parting with it and getting another Tang as this is my main mechanism for algae control. But if all Tangs are known for this, well forget it.

Thanx much and cheers,