I don't understand why a UV sterilizer must be part of this otherwise wholesome family entertainment. Install the biggest one you can afford, don't turn it on, just have it there to scare the algae away. That's what I do and it works. Ah yes I also don't have light over that tank.
Ok, InToTheNew! Time to hear about the 6" H beam you so generously promised to us on page 1 of this amazing saga!
(The above image is Russian. If you can see it you have been infected by a Russian computer virus. To check try to say "doh-svee-dah-nya", if you can call 911)