Awesome magnet, works well, worth the seemingly steep price. It works well on acrylic tanks, but you need to be a lot more careful. If you own an acrylic tank, you're probably used to that, though. Specifically: With glass I'd leave the magnet in the tank at all times, but with acrylic I don't want to risk something growing in it that will scratch. So taking it out every time is sort of a pain, but not a huge deal. (Posted on 4/25/12)

Cuts the time down on cleaning glass. Highly Recommend. Great product. Little spendy though... (Posted on 4/5/12)

man these things are strong.
that is a good thing but i do think it makes scratching your glass so much easier too. i find myself just using my mag float because of this.
if you had way thick glass this would be the way to go (Posted on 3/14/12)

When I bought the piranha float I didn't know that it would be built this well, it looks good and performs great. (Posted on 3/3/12)

This thing runs circles around the cheap chain store versions that shake themselves off. (Posted on 2/24/12)

This is one powerful magnet. Be careful with it (bruised my finger trying to set it up). Expensive, but worth it. (Posted on 2/9/12)

This is indeed a very strong magnet, I used it for my starfire glass, so far I did not get any scratch, but caution is needed. (Posted on 1/14/12)

I decided to splurge and get one of these after seeing the reviews. Honestly I think its a very high quality and nicely made glass cleaner but for the price I dont think it was worth it. I still have to swipe the glass several times just like with the magfloat.
Overall its nice and more physically appealing than a mag I am happy with it just dont understand why it costs so much. (Posted on 1/10/12)

Excellent glass cleaner much better than the mag floats, however I think its expensive. You will not be disappointed though. (Posted on 12/20/11)

The stars on this review don't reflect the item, but just to get your attention: Note that all the Algea Free brand magents on BRS site are mislabeled- for instance, they say this magnet is for 1/4 and 3/8 glass or acrlyic. In fact, the packaging says for acrylic 3/16 to 1/4", for glass 1/4 to 3/8. My aquarium was 3/8 acrylic so had to return. Checking the larger sizes on the BRS, they are simlarly mislabeled- enlarge the photos of the magnets to get the correct
sizing for your aquarium. The cleaner looks well-made and I'm sure when I get the right size it will be great! (Posted on 11/29/11)