How to remove hard water/stains

[Reefingmark]

Hello fellow reefers. I just purchased a used 120 gal drilled tank. When I got it home I realized it had a few water stains that I cant get off with a razor. I used vinegar and clr so far to try and remove the stains from my glass but to no avail. Well the outside stains did go away a bit but the harder inside stains are not budging. I can used any and all the help I can get. Thank you.

 

[nereefpat]

Try soaking a paper towel in vinegar and letting it sit on the glass. The contact time can help.

I've noticed that, a lot of times, after the tank is full of water, those stains can be nearly invisible.

 

[Reefingmark]

I've thought about that (just adding water and letting the inside soak) but its just an eye sore. I was wondering if I could remove it now while the tank is empty.

 

[gamerunr]

+1 on the vinegar, the right scrub pad a little patience and a lot of elbow grease

 

[jlmawp]

Vinegar works for sure, but CLR or Lime-Away might add a little bump in intensity. They make foam sprays so it stays put on the stain. The paper towel method above is a good trick too.

Just make sure to rinse it really well if you go the chemical route!