Scratches on glass

[mattborn]

I've tried the magnetic scrub brush, and a hand held scrub brush, both for glass aquariums, and everytime I've used either I've been getting very small scratches on the inside of the tank. I make sure not to get any of the substrate on the scrubber, but yet it still scratches the glass. Any suggestions?

 

[mr . salty]

Are you sure it's glass, and not acrilic. I looked at your pics,and it is a beautiful tank,but I cannot tell from them. Try scraping with a credit card,or similar devise. STEVE