Removing coralline from glass

[markywmson]

Hi all

I know the usual answer for removing coralline is scraping and vinegar, but this is a bit different. This is very old and white and seems almost etched on the glass. I have used razor blades, windex, vinegar, scrubbing, CLR and I can't make a dent in it. Has anyone experienced this and have any ideas for removing/fixing this?

Pics (the last one probably shows it the best)
http://i144.photobucket.com/albums/r187/markywmson/Aquarium%20Stand/660064C8-F12F-429C-AE43-A393F3F37B0B-1982-000001EE3DD4F9BB_zps3d1189d0.jpg
http://i144.photobucket.com/albums/r187/markywmson/Aquarium%20Stand/7DAE56BB-A58F-452F-A3A7-86B3259446E1-1982-000001EE43E18BAD_zps3e520559.jpg
http://i144.photobucket.com/albums/r187/markywmson/Aquarium%20Stand/1B740FAF-9F75-4C6E-BCD1-F11877972995-1982-000001EE481FB50C_zps6f885c17.jpg

[ecoreefman]

That usually goes away when you add water if you are talking about the white haze.

[markywmson]

Ok thanks! I was killing myself trying to get rid of this!! Much appreciated :)

[SushiGirl]

You can also try muriatic acid, just be careful with it.

[buildinboats]

you can also try muriatic acid, just be careful with it.

+1

[PatW]

With muriatic acid, be careful. To people who have a laboratory background, it is hydrochloric acid. It is what is called a strong acid. Generally, people use it under a "hood". A hood is an area that has blowers in it to vent off all the fumes so you don't breathe them in.

I would dilute any hydrochloric I used about ten to one with RO/DI water. Also, open the bottle in a well ventilated area like your driveway. You are just trying to remove Calcium Carbonate which dilute hydrochloric will attack like nobodies business.

Also, hydrochloric acid can have all sorts of nasty outcomes with common house hold cleaners. I would not combine it with anything else but water. Afterwards, rinse away with plenty of water.

If you take precautions, it is pretty easy to work with. It is not like sulfuric acid. Even a tiny amount of sulphuric acid on your blue jeans will eat big holes in them. The acid converts the cellulose of the cotton fibers to sugar so when you wash, there goes the fabric.

[jackde]

Try laying the tank down 1 side at a time. Poor in strait vinegar so glass is covered and let sit for hour or so. Give it time to soak and then scrub.