Water Environment Federation (WEF) Discussion ForumsWater Environment Federation (WEF) Discussion Forumshttp://www.wef.org/TechnicalDiscussions/jfuller@wef.orgThu, 21 Aug 2008 22:12:41 GMT20http://www.wef.org/TechnicalDiscussions/Topic1627-16-1.aspxIt might be a good place to start. However monitor it closely. You don't want to kill your algae.Thu, 27 Apr 2006 21:35:00 GMTJerryhttp://www.wef.org/TechnicalDiscussions/Topic1627-16-1.aspxWe have two Trickling filters which run in parallel. Chlorination is metered in GPM and dosed in PPD. References I have seen recommend dosage at 5-10 GPM with a trickling filter chlorine residual of 1PPM for 4 hours per week. Do you support this info. Thu, 27 Apr 2006 10:54:33 GMTPoquonock Carl