Vecton are great uv sterilizers! I have two Vecton v2 600s on my 6x2x2 setup! I have each one hooked up to an Eheim 2213,my main filters are my two fx5s though.I bought my sterilizers over a year ago and they are still running 100% fine,no problems so far.They are also very easy to setup,they have an led light on the front caseing that lets you know when the bulb needs replaceing,but mine still dont! even after a year.My tank is CRYSTAL clear and illness free.Hope this helps a little.