
Can't say for sure how long it lasts or how it works. For the price I paid I'll just hide it. Why? It's huge. I've never seen it, but from the photo I thought it was a lot smaller. Thank god I didn't buy 2 packs. I'm afraid my fish will have their tails or fins cut off. The blade is near the opening of this device and I feel that this is too big a hole to fit in an aquarium with fish. It should have been less at the front opening. Can be suitable for a very large aquarium with very large fish. You should explain it with this model. There was no magnet in the box. Hope it was new! As stated in the box! UPDATE: 7/9/20 I've been using it for a while and it's actually safe and has a strong current. The fish is ok. I love the fact that I can move it and it helps move all the gravel debris around so I can scoop it out with a net or vacuum it into a filter. This is funny! You'll be amazed at how much comes from the bottom up. This reduces the time it takes you to empty the tank, especially when you're lazy.

Powerful And Quiet Submersible Pump For Aquarium, Pond, And Hydroponics: KEDSUM 660GPH Pump With 6Ft High Lift And 3 Nozzles
29 Review

Aquael Fan Filter Mikro Plus
35 Review

Sink filter Prio New Water Start Osmos OU380 white
79 Review

Humidifier / air purifier "Fanline Aqua VE400" with an ionizer, with a capacity of 410 gr/h
44 Review

Efficient 2-In-1 Magnetic Fish Tank Cleaner With Non-Slip Design And Scratch-Free Blades
37 Review

Mini pump Xiaomi Mijia Electric Pump 1S, plastic, black
55 Review

Vacuum cleaner TEQQO Aquastick 3 in 1 Power, grey/turquoise
26 Review

Greenpro Micranthemum Monte Carlo: Live Large Pearl Grass Aquatic Plant In Tissue Culture Cup For Freshwater Fish Tanks And Aquariums
49 Review