I agree. If I am remembering correclty, a Fluval 305 doesn't really turn that many gallons per hour, which would be required for an 80 gallon (or a 72 gallon for that matter.)
One 305 and a 405 would work well, or you could do as suggested, and just buy the mega-super FX5. I use one of these on my 125, and I love it. It has amazing capacity for biomedia, but is a little bit of a pain to clean, but worth it in my eyes!
One 305 and a 405 would work well, or you could do as suggested, and just buy the mega-super FX5. I use one of these on my 125, and I love it. It has amazing capacity for biomedia, but is a little bit of a pain to clean, but worth it in my eyes!