I have a fluval 406. Its rated upto 400 litres, but i use it on a 200 litre. I would give it maybe 7/10. It works fine, there are a few drawbacks.
- I dont like the ribbed hoses. It prevents to installing things like inline heaters etc. And in my head a ribbed hose gets clogged easier.
- Its a pain in the *** to prime. Worked fine first time, but since then the priming lever doesnt do its job. Ive since found out this is a common problem with the 06 range, dont know if this persists with the the 07 range. There are work arounds, but it doesnt work as it should.
- I also think you should half the tank size for the 06 + 07s based on the rated size. I aim to get 1kg biological media/100litres of tank. With a 406 i can get 2kg with the top basket spare for chemical media. 3kg if you fill the top basket with biological media and forgo any chemical media. Based on this if you are going Fluval I would say go for the smaller FX but a 407 would just about work. Your aquarium falls between the largest 07 and smallest FX.
Plus side for Fluval.
- A little cheaper normally.
- Everyone stocks them and its easy to get spare parts.
- I think there is a broader knowledge base of Fluval products, so troubleshooting is simpler.
If I had to go again, I would do Eheim. Maybe the Eheim Experience 350. Cant comment on them, because I havent used one, but my aquatics mentor swears by Eheim. When my next annual maintenance on the 406 is due, I think I will change over.