Which grain size scratches glass tank easily?

[magical26]

Hi Reefers, wanted to know whether smaller grain size (like sugar-fine) or larger grain size scratches glass easier. I know that both have the potential to scratch glasses, but which one is more prone to do so... smaller or bigger grain? All inputs from your experiences are welcome...

Thank you

[xiggie]

All sand will scratch glass , be it suger fine or grain size or boulders ... Difference is the scratch itself sugar fine scratch , grain size scratch or bloody obvious ####%¥¥xx<# scratch (which I have)