Algae Free AGF56103 Sure Grip 50 Magnet Holder

This Magnet fit our power-head no problem. We absolutely love it. It is a good quality Magnet and even fit our power-head that isn't one of the most popular brands. We will definitely buy more from products from this company and will recommend to our friends and family.

If your using something light there it's fine but I tried them on the Marineland Magnum Polishing internal filter and use it as a power head/filter with media and filter floss and it was to heavy for the magnets. Use it for just a power head it's fine. O by the way the Marineland polishing internal canister filter don't waste your money. If you want more filtration your better with a sponge filter or a HOB.

Doin' the job I asked, what more can you ask of it. Greatest for quick placement of maxijet pumps

I bought 2 of these to pair with my Marineland MaxiJet 1200 circulation pumps because the suction cups kept detaching from the glass, causing the pumps to blow sand all over the tank, smothering my live rock and my corals. They work great! My pumps do not fall off anymore! Highly recommended!!!

These are hands down, the best magnets I've ever used. I'm using mine to hold up an in-tank skimmer, and another pair for an algae skimmer. Very strong magnets. Highly recommended.

Setting up a saltwater aquarium requires proper water quality, filtration, and lighting. After investing quite a bit of time and money in preparation, the one annoyance that constantly disrupted my tank was the failure of the suction cups on my powerheads. On a weekly basis the powerheads would lose suction and fall stirring up the substrate and coating my live rock with a nice layer of silt. It took me two months before I invested in the Algae Free Sure Grip Magnetic Holders. I haven't had a problem since. The quality of the reef aquarium is dependent upon the quality of materials put into it, including Algae Free Sure Grip Magnetic Holders.

Works great, I’m using it on 1/2 glass and it still holds

This magnet is very strong and I use it for my protein skimmer mounted on the back of my tank.It's a great magnet for the money...