a UV in no way will act as a power filter.
Thanks for the tip. I hadn't thought of that, but it makes perfect sense. One should never underestimate an O-ring!I have not had a problem with water leakage in mine. you might try a little Vaseline on the O rings when you put it back together.
The water flow-rate for my 7 watt doesn't seem that fast in my 50 gal. Since you are considering a larger tank than the 20 gal, the 7 watt doesn't seem unreasonable to me. You can count on one thing, the more UV light, the more kill of potential pathogens, green water algae, etc.I got one more question for you guys. My biggest tank is 20gallon right now but I am planning to get something bigger. So I want to be able to use the sterilizer in small and my future large tank. Looking at the submariner brand they have the 5 and 7 watt but both are rated at 132 gph??? What the healll?
It the same amount of water flow rate in and out why bother with 7 watt? The 5 watt should be effective within it's spec so seems to me the extra 2 watt is useless unless the gph can go higher for the 7 watt.
5 Watt 132 gph 9" x 3" x 2-1/2" 40 gal $65
7 Watt 132 gph 10" x 3" x 2-1/2" 70 gal $80
Sounds reasonable.Thanks Diana. I agree the higher wattage the more potent. The thing I question is that if the 5 watt kills 99% of the water that goes through the sterilizer at it's max rate and the 7 watt also have the same max rate than it would not be much different at al. But after a little more reading, it seems that the submariner have variable rate you can control so that I am guessing at lower flow rate it would be 99% but as the flow rate increase the potency decreases and that would justify the 7 watt usage because it will be more effective at higher flow rate.