This Old Spouse
TOTM Winner May 2013
I just received a 15g tank that once housed a turtle. It was filthy, but now I've gotten most of the crud off. Now, how do I get the glass to sparkle without using any cleaners? Is vinegar acceptable?
elbow grease
On older ones, haze is sometimes impossible but you can try a little pool of vinegar which you then rub with the inside surface of a large piece of lime or lemon peel, simply get comfortable with the tank on its side and rub a section for a long period of time (see if it seems to be helping before you go on doing the whole thing.) There are also people who put on protective clothing and use more dangerous acids - I don't remember the details (muriatic? oh, just the old name for hydrochloric, no wonder its so dangerous, ugh.) WD
You use the peel to rub the vinegar against the glass and elbow grease is definately a part of it. But be forewarned, some old tanks should just be chucked - tanks are actually usually one of the cheaper bits of hardware...
How about trying to clean the glass with pure ammonia?
As a weak base (or sometimes it can act as an extremely weak acid,) ammonia seems unlikely to do anything effective with lime/calcium deposits. I think this is why you usually see acids such as citric acid or vinegar suggested. I think there is also a time factor: most people don't have the patience to allow pools of vinegar to just sit there on the surface that has become encrusted. I don't know, I'm not any kind of expert on this.. wouldn't it be interesting to hear from some geologist.. perhaps the CaCO3 or whatever actually bonds and permanently marries up with the silicone of the glass or.. (hey, what is glass? I guess mostly SiO2, CaO, Na2O..? there might really be some reactions that allow the oxidized or non-translucent aspects of hard water deposits to become permanently chemically locked to the glass.. maybe?)How about trying to clean the glass with pure ammonia?