hypothetical fx5
Hi
Yeah I worried about the same things but I've been running it like this now for a month or two and it's going great. My tank is 720litre. I'd say give it a try, you can always change it and build a reactor once you're up and running, but I have a feeling you'll stick with it and be happy of the minimising on hardware. Remember also that if you want to put in an inline reactor you'll need to change the Fluval ribbed hosing.
The FX5 cut off period lasts 2 mins, that's all. I've not noticed any downside to this.
To be honest, I wish I had a clear cased FX5 so I could see what goes on in there but I imagine those CO2 bubbles, and lots of them are diffused and become liquid fairly quickly in the turbulence of such a powerful filter.
Once you get this filter set up, I bet you'll want another one 🙂 the tank certainly doesn't need it, but as I had a heavy fishload, (6 large silver dollars, 6 medium to large cichlids and 4 medium to large plecs) 🙂 I saw a secondhand one for sale and snapped it up. It was either that or add powerheads as I wanted lots of flow. Not really sure it was necessary but hey, I couldn't resist 😀
Cheers
Gavin