I have a 15g, fairly densely planted tank, ugf, CO2 (I know, I know....), medium/heavy fish load. All is well except I have HORRIBLE algea in the uplift tubes, mainly blue-green, but generally just mucky. What to do? I have thought of leaving the filter off for a while to see if any of my algae eating types fancy a visit to algae heaven (or hell) Or maybe dropping a couple of snails in?! <<<<<<<<<<<<<<<<<<Spug (Sparrow) London, UK.>>>>>>>>>>>>>>>>>>>>