Here are the recent answer to this question.
By Cassie 03/24/2011
The aquarium that I got from my sister had the cloudy look and rings in it and I took just plain baking soda and scrubbed the glass real good and it cleaned right up and rinsed real good to be sure I got all of the baking soda out.
By chris (Guest Post)09/17/2008
I have worked and made aquariums for yrs. The thing is, is it plexi-glass or glass?. If it's plexi glass, do not use anything but the softest suff for teflon pans. It scratches really easily. Fill it & let the water sit on it for a few days, then use something really gentle. If you use any cleaning products on it, the plexi-glass will absorb it, then you might have many fish or whatever, die. If it's glass, do mostly the same thing. Let the water do the work, with maybe some bleach in it. After a few days, just clean with these cleaning pads for glass aquariums & rinse really well, before putting any animal life in it.
By Janice C. 05/03/2008
You might try CLR. It's supposed to be environmentally friendly and it's available at lots of places, Walgreen's, etc.
By marisa 04/30/2008
I always use table salt to scrub with. Sometimes I use a Brillo pad too. I know it's not recommended but if your rinse it well it will be fine. I have also used Magic Erasers. They work wonders. I have had aquariums for 30 years and never any problems. Good luck.
Add your voice to the conversation. Click here to answer this question.