Hi i was at school today and we was working with perspecs in Product design.
So i thought if i got a blue peice of perspecs it would look good if i lay it on the ledges where the lid sits on the fish tank.So i asked my teacher and he said sure here take this piece so i did.
I got home and went in to my bedroom and layed it on the ledges yes it fitted
so i turned my light on and it looked amazing i unplued my light.After a while i went to look at it now it was a bit darker and my light bulb went in my tank
so i didnt get to see it that good but its a cheap way to make water look blue. 
So i thought if i got a blue peice of perspecs it would look good if i lay it on the ledges where the lid sits on the fish tank.So i asked my teacher and he said sure here take this piece so i did.
I got home and went in to my bedroom and layed it on the ledges yes it fitted
so i turned my light on and it looked amazing i unplued my light.After a while i went to look at it now it was a bit darker and my light bulb went in my tank
