I have 2 rena Xp-3 on my 75 gallon and find it perfect for what i need. I also feel its better to have 2 filters running rather than one big one incase one decides to stop working. You can get 2 XP-3's from Big als now for $210 shipped, using there promo code...well worth the money.
“We didn’t underestimate them. They were just a lot better than we thought.” -Bobby Robson
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