Removing stubborn algae from tank glass

[batang_mcdo]

Need help with removing stubborn algae from my tank's glass
I'm unable to remove them from the glass by wiping with cloth.
I have a magnetic glassw scrubber, but this also can't remocve the hard green algae
need advise/tips please.

 

[joe jaskot]

Nothing works better than a razor blade for removing algae from glass.

 

[MyGiants]

You have Green Spot Algae which is a tough algae to remove. Razor blade can scratch glass. Better to use a piece of hard plastic like an old credit card or something. I use a piece of acrylic filter material. Cut a small piece and scrub it off.

 

[joe jaskot]

You have Green Spot Algae which is a tough algae to remove. Razor blade can scratch glass. Better to use a piece of hard plastic like an old credit card or something. I use a piece of acrylic filter material. Cut a small piece and scrub it off.

Razor blades do not scratch glass (just make sure the glass is wet before scraping). Read this:

Q. Do metal scrapers or razor blades scratch glass.
A. No. Metal scrapers and razor blades alone will not scratch glass. However, abrasive materials, such as sand or fabricating debris from the tempering process, trapped by a metal scraper or razor blade, can scratch glass.