DrRob said:Zeolite is good as an emergency measure when something has gone wrong and you're left with a high ammonia level and no available biofilter, or when you're transporting in conditions that a biofilter might not like.
It's actually a problem otherwise as it tends to starve the filter of ammonia, which is essentially it's primary food source, and then fill up and stop working, with a struggling biofilter left to cope.
DrRob said:Sadly no, It lasts until it's full, then it stops, fairly precipitously.