I used a fluval on a 55g. After i removed it, I noticed no difference other than my pulsating exina. It started to srivle p. I put carbon into my overflow, xenia is doing fine now. I think so long as you are changing the floss and carbon every 1-2 weeks there is no problem with them. You just have to keep up the maintence. IMO.
__________________
Marty
50g reef, bubble king skimmer,20g sump,zeovit system, PM cal reactor
|