Water Level marks

I have water level marks on the inner surface of my aquarium...anyone knws how to remove it?

thanks

Wash it, don’t be lazy.

its very hard to wash....any way to scrub?

use a scrub and some multi-purpose detergent or washing agent ?

u tried before?

Are you going to ask for pictures next? Laughing

nope. the whole removal process has to be documented and uploaded to youtube

Pay me before i do it.

And obtain ISO certification, as well as the patent office be made informed. Laughing

If i tried before, you think i would still put that question mark.

Don't sabo me leh...

pls PM NT2 to settle the royalties.

pls keep to topic. Mr. Green

Siao.

You want your fish to die?

Plimsoll line...
markings on the hull of ships

out of point,
+1

Laughing then only wash once after that no more washing needed

not mine, why should i care... Laughing Mr. Green