Pick my next filter

[Cal Amari]

And the fx4 has a bottom drain which makes water changes a breeze, but I don't think it's on the FX 2...

 

[Roger Mcfish]

Hard between fx2 and 407 as they both do a good job and I own both. But I prefer the fx2 only because of the spread of surface agitation it provides vs 407. I can't speak on the marineland as I've never owned one.
On 3 of my 75 gallon tanks, I run the fx2 with tidal 110.

 

[Jason_S]

The worst part was tryng to pop the top part of the can loose from the bottom part, I even remember wedging a table knife in there and twisting it sideways once

Yeah what is that about?? I set it up in the kitchen, then took it to the fish room. For reasons I wont go into, I wanted to open it back up and GOOD GRIEF! Did the bioballs become radioactive or what?! Lol

 

[Jason_S]

And the fx4 has a bottom drain which makes water changes a breeze, but I don't think it's on the FX 2...

I originally tried to get the fx4 but it was sold out, so thats how I wound up ordering the fx2. When comparing the 2 I did read about that bottom drain on the fx4, but the I also read quite a few complaints mentioning issues with leaking from that drain.

 

[Cal Amari]

Yeah, I've read those reviews too, and am careful not to twist or torque the valve unnecessarily. I wish it was a stringer piece, but I'm 4-5 years in now with no issue yet.

 

[Roger Mcfish]

I originally tried to get the fx4 but it was sold out, so thats how I wound up ordering the fx2. When comparing the 2 I did read about that bottom drain on the fx4, but the I also read quite a few complaints mentioning issues with leaking from that drain.

Fx2 is fine. It'll keep a 75 gallon water clarity spotless. Plus when you do maintenance on them, they aren't as heavy as the other fx models