Anybody ever use one of these filters?

[slumpysix]

I bought a couple of these and I think they are not that great. They are weighted but just want to float like a chunk of styrofoam. I zip tied it to a heater bracket with suctions but still wants to break the surface. I should have just bought the other. Anybody have any tricks to get it to stay at the bottom... thanks...

 

[FMarini]

you got to much air trapped in the foam. when you submerge them, squeeze them and it will force out more air, once the sponge fills w water -it sinks

 

[slumpysix]

I've tried that. doesn't help

 

[GreshamH]

It has always worked for me after time and I've used hundreds

 

[Zooid]

I have one and it works fine. If it doesn't sink after you squeeze the foam then there is probably a manufacturing defect. There may be air in the plastc body where the weight is.
Like I said, mine works but I bought some from drsfostersmith that I like better because the foam stands above the bottom of the tank and it is weighted far better.
Good luck.

 

[slumpysix]

seems to have a decent weight as far as that goes. maybe it just needs to be broke in... thanks guys...