I have a 29 gallon and use a penn plex cascade 1000 and it pushes 265gph, there is no such thing as over filtering a freshwater tank (to a sense). The only thing you’d have to worry about is output flow but I don’t see to have a problem
Before this I had a marineland 220 and it puts out 220gph and that thing worked wonders on my tank
So I wouldn’t really follow what the packaging says
Very true, very trueI don't know that it is so much the manufacturer doesn't know what they are saying as, most of us just like to over-filter. I have Quiet Flow 20 HOB on my 20 tall and also put in a big sponge filter rated for a 60 gallon tank. Also the manufacturer won't know what each different tank is going to need. Their rating may work just fine for a minimally stocked tank. But, like I mentioned, most of us here love to over-filter. Besides, having multiple filters is a good thing too.
How do you like your Penn Plax 1000 and how long have you had it for? I just got mine for $67 about a month ago, it's so far running well on my 38G cichlid tank.