Typically it will lost 30% of its flowrate after fill in media, 1000 l/hr will become 700l/hr.
I have 2217 from colleague, been running since 1995, only change the O-ring because I saw it crack. The original eheim O-ring cost me less than $10. I believe it worth all the money. Just imagine running continuously for 13-14 years.
On the other hand I also had Jebo 809, leaking within a year luckily I'm around when it leak. Order o-ring from petmart cost me $13 fix it up and still leaking

. Half or even third the price of eheim but my personal opinion not worthed. I guess I got what I paid for
I do heard people complain eheim quality is dropping, no idea how true. I have 2217 (oldest), 2215 (old), 2213 (new) and recently purchase 2211 (new) all running fine.
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