Is this bad coming from the pump impeller?

[Max93]

Hello,

I have an eflux 1900gph pump that I use for my UV sterilizer.

I noticed cleaning the impeller today, that the magnet when you rub it on a paper towel or a towel, it leaves a dark residue. Is this bad? If so why are we using these things for our aquariums?

my gyre magnets where doing the same thing so I got rid of them and got an MP60 instead. See attached image.

thank you

 

[T-J]

What do you think is inside your MP60?

 

[Eagle_Steve]

From my experience (I have gyres that are as old as when they were release, so will use them as an example), this is just slime/bacteria or something else. Unless it sticks to a magnet, then no worries. My gyres are still running, have had this every time I clean them and any icp test I have done has no issues with any metals or anything like that.

I also use MP40s and mp10s. They end up with the same thing, just takes longer to build up due to the design.

 

[Max93]

Thanks for the reply.

it just a major concern to me - are all our pumps producing this? The exposed magnets inside the aquarium for the gyres really threw me off - the amount of “magnet” coming off was absurd which is why I got rid of those. It just kept coming.

Is this a design flaw? Like, I see what you’re saying if it’s not sticking to a magnet but what are the long term effects ?

 

[Eagle_Steve]

Thanks for the reply.

it just a major concern to me - are all our pumps producing this? The exposed magnets inside the aquarium for the gyres really threw me off - the amount of “magnet” coming off was absurd which is why I got rid of those. It just kept coming.

Is this a design flaw? Like, I see what you’re saying if it’s not sticking to a magnet but what are the long term effects ?

So far after quite a few years, none for me. No elevated anything in any of my tanks and no issues with sensitive corals in the tanks.