2dawghouse
New member
No, because zeolites help nitrifying bacteria, not denitrifying bacteria.
Nitrifying convert ammonia to nitrite, to nitrate. Denitrifying convert nitrate to CO2 which is then gassed off. The latter are much harder to colonize in an aquarium as they need low flow and virtually no oxygen. Nitrifying bacteria are ready to go in about four weeks (your cycle) but denitrifying take much longer and that is assuming there is a place for them to grow. This is where the media comes in, they allow the denitrifying bacteria to live deep inside where there is almost no water flow. This is also why you typically change out some media periodically, as the bacteria only live so long and when they die they will start to clog the media pores. Other brands of media such as Siporax and Eheim SubstratPro recommend the same thing, but at the same time some people use it for years and never touch it without issue.
Thank you, makes perfect sense to me now. So with the media pre-seeded with denitrifying bacteria, then the colonization should be instant for the most part?