Originally Posted by skelator
have you noticed any change whatsoever in nitrates comming from the diy filter?
I just tested the effluent and the tank water and can not detect any real color difference between the two. I'm convinced it's handling ammonia and nitrites, but can see no resulting evidence of anaerobic bacteria processing/reducing nitrates.
I lamented to Seachem Tech support recently that after 8 weeks I expected to see some, even slight results. (Going in they said that with my setup and using their Stability product, I should begin seeing nitrate reduction in a couple of weeks!)
They could only offer that the reduction in flow should help and I just need more time for the bacteria to develop.
In all fairness, I may be guilty of a minor foot shot. The overall objective was/is to get and keep tank nitrates low. I added anacharis floating plants (which seem to be growing very well). After a few weeks, I began using activated carbon and Purigen in the AC70 filter. I've been careful with feeding. Water changes have been 10g weekly (60g tank) with a 50/50 mix of treated DI water and FNR filtered water (nitrates < 5ppm). The water change has included gravel vacuuming.
Much of this reduces dissolved organic compounds which ultimately reduces nitrates, HOWEVER, it also reduces the food supply for the various bacteria.
Perhaps inadvertently, I slowed the bacteria development process?