I got tired of trying to take pictures of my fish and constantly having water stains from the glass ruin the shot. I was a little nervous though about using chemicals near my tank as well though. often i would just take a cloth to the glass but I decided to give this product a try. The first time I put it on, I couldn't believe how clear the glass was. It allowed me to get some great shots of my fish. It leaves a polish on the tank that makes it more resistant to water spots, fingerprints, smudges and other marks that tend to end up on tanks. I suppose you could just use windex, but this product does claim that its a bit safer that windex. I would recommend buying it.

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30gL heavily planted: south american community tank
15g mod. planted: nano fish community tank
6g long(custom tank) mod planted: 6 bettas w/ dividers