I'm running a 29Gal bowfront with a MarineLand Penguin 200 HOB which is supposedly rated for up to a 50Gal tank..
I've noticed that my filters last a week maximum.
My tank isn't overstocked and I don't overfeed.
I buy the genuine C size filters. The cost is killing me and will probably kill my fish if I don't do something.
The carbon in these things blocks up the black plastic backing and impedes water flow.
I called MarineLand and told them about it,
They didn't ask for a batch number to enable them to trace the problem.
I was told that if I send in my UPC they'll send another set out.
The girl on the other end of the phone said that she doesn't rinse the filters and just drops them into the HOB.
That's great - I'll send the UPC in, wait for the filters to arrive and in the meantime I'll explain to my fish that they'll have to do without filtration for a few weeks.
I could make the 25-mile trek to the nearest store that stocks C-size filters and start the whole process again but where do I draw the line?
This is getting out of hand. I buy 3 packs and this is the 3rd time I've had to spend 15 minutes rinsing the carbon out of 9 filters.
I understand that some carbon will come out of these filters but there's something very wrong here.
This is a picture of 10 seconds rinsing over a jug:
This stuff just keeps pouring out the back.
I don't crush the carbon and I'm simply letting the water flow over the filter, it's not like I'm using a pressure-washer to rinse these things.
I originally though the filters were just getting dirty, but I woke up this morning after replacing another filter to find out the Biowheel had stopped and tank-water was pouring from the overflow.
This was a new filter replaced only 2 days ago.
I've noticed that my filters last a week maximum.
My tank isn't overstocked and I don't overfeed.
I buy the genuine C size filters. The cost is killing me and will probably kill my fish if I don't do something.
The carbon in these things blocks up the black plastic backing and impedes water flow.
I called MarineLand and told them about it,
They didn't ask for a batch number to enable them to trace the problem.
I was told that if I send in my UPC they'll send another set out.
The girl on the other end of the phone said that she doesn't rinse the filters and just drops them into the HOB.
That's great - I'll send the UPC in, wait for the filters to arrive and in the meantime I'll explain to my fish that they'll have to do without filtration for a few weeks.
I could make the 25-mile trek to the nearest store that stocks C-size filters and start the whole process again but where do I draw the line?
This is getting out of hand. I buy 3 packs and this is the 3rd time I've had to spend 15 minutes rinsing the carbon out of 9 filters.
I understand that some carbon will come out of these filters but there's something very wrong here.
This is a picture of 10 seconds rinsing over a jug:

This stuff just keeps pouring out the back.
I don't crush the carbon and I'm simply letting the water flow over the filter, it's not like I'm using a pressure-washer to rinse these things.
I originally though the filters were just getting dirty, but I woke up this morning after replacing another filter to find out the Biowheel had stopped and tank-water was pouring from the overflow.
This was a new filter replaced only 2 days ago.