Anti Algae Sheet

Saw this at the Jusco Home Center when I was in 1 Utama just now.
According to the back, this sheet can supposingly kill water borne bacteria thus making the water clear of algae. One sheet can be applied to 25 litres of water and can be used for 18 months.

 

Here’s what I’m going to test it on.

My water lily  “pond” on the balcony. Will take another photo of it after 1 week to see the “progress”