A little secret in Brush.

PRO-BRUSH is a professional aquascaping tool for scraping off algae on stones or any other layout material.  
An abrasive brush enables you to remove stubborn algae efficiently with small force.

Please ask more details in ADA distributors/retailors.

■Pro-Brush | Creaning Goods - LAYOUT & MAINTENANCE TOOL
Check the detail to this link >
Available at the end of November.