prow
Well-Known Member
i am right there with you no doutFirst of all, I would like to say thanks for the friendly debate. This is one of the thins I love about RS, people seem to keep their cool and can be mature when they disagree about things.
yeah there is some good stuff in there. i like the way it was put together. i dont agree with everything and it dosent go into compensating mech very much. but still very good and pretty thorough for what/who it was targeted for.And great link! I'll have to read all the parts in that series...
yes fish feces and things are the "orgin" of most, but you forgot the first part of that statement. "In aquariums as in the wild, it has its origin in fish feces, coral mucus ect.." so with your rational bacterial flocculation is a minor component of the source of POM in ocean aswell, which like you said, its been well studied and shown is a major component.In your cited article he states that "Bacteria can even convert dissolved organic material (DOM) into particulate organic material (POM) by aggregating it in the presence of carbon." However he also states that the primary source of POM is "fish feces, coral mucus, algal remnants, worm castings and burrowings, the molts of small crustaceans, uneaten food, and other debris". This suggests to me that bacterial flocculation is a minor component of the source of POM. However, I will concede that it can exist in the tank.
"In addition to binding particles together, the presence of mats and biofilms in sediments affects sediment physical properties such as porosity and permeability, the flux of dissolved substances in pore waters and the dissolution of particles and can, therefore, influence early diagenesis." (F. WESTALL, Y. RINCÉ (1994) Biofilms, microbial mats and microbe-particle interactions: electron microscope observations from diatomaceous sediments
Sedimentology )
yes, i am/was taking into consideration rock, sandbeds even baffling within the sump. so yeah i think your right we are coming from different perspectives here.Our water is extremely well mixed when compared to the ocean, here is a typical nitrate profile for water in the open ocean...
I just used nitrate as an example, but profiles with large variation can be applied to salinity, temperature, density, and many other chemicals. Comparatively, our tanks are very well mixed. Even a small amount of flow mixes the water column from top to bottom very easily. However, we may be talking about different things, if you are including the water trapped in the sand bed or rock, then I would agree that this water is very different from the water in that is flowing throughout the tank.
i will try to find this certain one i have in my head. the only things i seem to find right now are studies like the one i quoted from F. WESTALL, Y. RINCÉ. here is one on hydrophobic organic stuff "that file on the water suface" and how it works with aggregate formations. (marine snow)That said, I always try to be open-minded and I would be very interested to see the studies you have referenced if you can find them.
http://www.vims.edu/bio/faculty/tang/AME42.pdf
mmm maybe internet misinterpitations at work. i agree with 100% with that.There are many microbial processes at work such as nitrification, denitrification, sulfate reduction, iron and manganese reduction just to name a few. My point was that macroalgae in the fuge can be very effective at removing dissolved nitrate and phosphate, and can do so in an aerobic environment.
i still put one from time to time. for me it just needs to cleaned to often to keep one all teh time. some dont mind cleaning it every 3-5 days or so.Ok, your link has convinced me on the filter sock and mine will be coming off.