Im currently using a fluval u2 in a 10 gallon tank
it has java moss, and a couple other plants in it
im currently using a flourescent light source with a powerglo bulb
im adding in Nutrafin plant gro every week / monitoring with a iron test kit
In the Fluval U2 filter their is 1 foam pad on each side and behind that their is a finer white filter which is also attached to a carbon pad.
past that it leads into the biomax media.
Im wondering is their any point to having the Carbon portion in the filter
- is it taking out my Nutrafin plant gro
- can i just use the finer poly replacement next time without the carbon?
IMO you can be. Some people have different opinions with it but I will say that I saw more growth after removing the carbon than when I still had it in. I would say remove it as long as you aren't using any medication (but that really should be done in a QT tank anyway).