The wattage does matter. Turbo Twist 6x is rated up to 250-gal tank, so using it on a 300-gal tank is a little bit pushing, but doable It may do fine with clarify job, but not so well with sterilize job
cor;3495473; said:
There have been quit a few posts recently about UV Sterilizers.
If you search you will find some great posts about wattage and flow rate.