thank you ... that site is very interesting especially considering they support the use of trickle filters:
Originally Posted by http://users.frii.com/gbooth/AquaticConcepts/index.htm
Given that heavily loaded plant tanks need extra biological filtration, and water movement and mechanical filtration should be provided, the question remains whether a trickle filter is worth the expense. Beyond the added biological filtration, we believe they are valuable for the following reasons:
- They provide good mechanical filtration via the prefilter in the skimmer box and filter pad over the drip tray.
- The mechanical filter media is much easier to keep clean than in a canister filter, promoting weekly cleaning and preventing wastes from accumulating and generating excess nitrates.
- The skimmer removes the surface scum that can form from proteins.
- They provide excellent water circulation.
- The biomedia stays clean since the water is prefiltered before reaching it.
- The media chamber helps maintain high oxygen levels at night when the plants are not photosynthesizing.
- When properly set up, they do not remove much CO2.
- The sump provides a convenient place for a CO2 reactor and other equipment.
i was under the impression that trickle filters stripped out the co2. as a matter of fact, on fish only tanks gaseous exchange would be in a list like the one above. it seems that it is dependent upon the way the filter is setup.
so, now the question becomes ... does anyone here use a trickle filter on their planted tanks or know what the authors above mean by "properly setup"??