I very rarely get email notification of updates of subscribed threads on the Dope but did get one today advising of a new post in this thread:
with the message:
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.