Eheim classic 250 external filter works best for me for my 150 gallon tank. and it did helped me to speed up the Aquarium Nitrogen Cycle [spam link removed] process.
But that post doesn’t exist - the last post was in 2010.
Any thoughts?
As far as I know, it’s not arbitrary at all but completely automatic. It sends a notification whenever a new post is made to a thread, regardless of whether or not it is spam (which it can’t recognize), as long as you subscribed to that thread. The OP posted to that thread, and must have automatic notifications on. Of course, it can’t tell if a post is later deleted.
It’s also possible that the notices are going to your spam filter. Some domains view “@straightdope.com” as a spammer (Probably because we do a weekly mailing) and so unless you’re checking the trap you wouldn’t see anything.