[mommyeireanne]

You could run just the pump and not the UV if you want. I run both all the time for 4+ months after new fish, and because I know I had MB in the tank at one time. I have to say though, I've had two of the 5W Submariners and both had the same problem: water leaking into the quarts sleeve where the bulb is. This one hasn't burned out the bulb yet and I doubt I'd t be given another exchange, so I just deal with it. I think when it's been long enough I may remove the light part all together and run it as you say, pump only until the UV is needed again for new fish. I really like how UV has given me good results with LFS fish, though.

 

[mommyeireanne]

I don't think it works as well when the quartz sleeve is fogged. My first Submariner blew 2 bulbs before I exchanged it. This one has also developed the tell-tale silver hot spot on the bulb tube. It is 5 months old & I dry it out once a month when I trim. I can see it's lit. If the bulbs weren't burning out, I wouldn't care about running it all the time. Maybe I'll try night UV. I have seen the benefit of UV in my tank. I'll always have one. I don't know if another brand would have better seals; a risk with any water appliance.

 

[mommyeireanne]

Alex,
yes, cord and plug for the pump, another cord with it's own plug for the UV. The pump cord has no on/off switch. The UV cord has an on/off switch.

 

[mommyeireanne]

I will do that. I feel stupid, I've done that on my very old mag light, but never thought to do this on the submariner. I have been looking for a new O ring. Thank you.