Hi,

I am troubled by difficult to remove diatoms (algae) in my lake Malawi
setup. This is made worse by the fact that it is a big tank 6ft long 5ft
deep and acrylic!

Anyone any suggestions/tips on shifting these without scratching the
acrylic? I'm currently using a Kent pro scraper/mop but the scraper is
occasionally scratching the acrylic and the mop wont budge the diatoms!

tia,

Sky