White residue on tank glass
 

I'm sure you guys know what I'm talking about, any tips on how to remove it? Thanks!

Oh i wish you'd mentioned what you've already tried. If its just along the top edge you can wipe it off with paper towel . post some more on it.

Hi, my apologies.

It's on a currently empty tank, all I've used so far is warm water and a sponge, that didn't remove it (just made it see-thru when wet). I guess a chemical would work, but not sure on which one to use, and what is safe for aquarium glass.

Thanks

You could try a salt scrub, or since it's empty you can make a baking soda paste, this removes most anything.last resort use a kitchen scrubbing sponge. You shouldn't use like bleach. i'm sure you'll rinse it.

If it's a glass tank, the easiest way to remove calcium buildup that I have found it to use a razorblade. Just be careful not to dig the point into the glass;-)

rubbing in salt would prob. put minor scrapes in the glass. a diluted bleach with a scrubber pad from a sponge is fine, vinegar works too. just rinse well afterwards and let it completely dry out.
as MB suggested a razor blade is also a great tool for this, just be careful of the silicone edges too.

I agree with the razor blade suggestion, it has worked for me many times, but just be really careful of the Silicone!

EPSILONVAZ: which worked best, i'd like to know. Thanks

beware the scrubby pads,they can add scratches.
i found the blade worked very well.

A razorblade would work best. Vinegar would be my next choice, as it would react with the calcium buildups (unlike baking soda, salt or bleach).