I purchased the following filter second hand:
...and I'm missing the bottom layer of plastic(?) filtration media shaped like cylinders, and the layer of little rock looking things in the layer above that (biological?).
I think I've identified what they are:
Bottom cylinder layer:
Layer above that:
So my questions:
- Do I have the right products?
- Are there any cheaper alternatives that I can use to replace the official Eheim stuff? (hopefully)
- In what amounts should I puchase for my particular filter?
The user manual is quite unhelpful for this matter. It assumed I already have this stuff and doesn't give any details.