I just purchased a 50 gal glass tank used and it has a cloudy film on parts of the glass. It doesn'r seem to come off. Any suggestions? 
Thanks, Steve
Thanks, Steve
Cloudy Film On Used 50 Gal Glass Tank
- Thread starter metweezer
- Start date
Try some vinegar or even windex. Try to get it off with a sponge. You can also scrape some of it off with a spatula, just make sure it's not scratching the glass. You can use any type of cleaner as long as you make sure you get it all off. The Doctor.
I hear great stuff about CLR. You might try it if the vinegar doesn't work. Just make sure to wash it out really well.
no, most glass has a pretty low reactivity and it takes somethin special to stain it without actually trying.
Some people have said that although they can't get rid of the film, you can't see it once the tank is filled with water. Is this true?
thats the way mine are. there cloudy when there empty but when I fill them you can't see it any more.
It's usually hard water deposits that have gotten down into the micro-abrasions in the glass. Many of my tanks look dull when empty, but I'm guess the light will bend around them because you can't tell when full.
i just bought a 175 and the left side panel is cloudy but the rest of the tank is perfectly clear. I filled it and it's still cloudy. When i mounted my intank refugium with suction cups then removed it 3 weeks later, the glass was clear where the suction cups were. It wont rub off. I learn to live with it.