Glass scrubber question

[Sexytang]

I have a 36g bowfront and was wondering what’s the best magnet to get hard algae off the glass. Didn’t know if one with razor would scratch glass with a curve

 

[Peach02]

I have a 36g bowfront and was wondering what’s the best magnet to get hard algae off the glass. Didn’t know if one with razor would scratch glass with a curve

in my experience magnet cleaners only get off soft algae if that, they are best for freshwater. Razors are what I use to get hard algae off but I've never used it on curved glass

 

[Sexytang]

See atm I use a original magic eraser works good but lots of hard scrubbing once every few weeks

 

[Peach02]

See atm I use a original magic eraser works good but lots of hard scrubbing once every few weeks

thats what makes me use the razor when I can as it is easier to remove the hard algae with the razor than it is to remove soft algae with a magnet