Bring it on Reed.
The intent of my threads like this one is to share and not prove right or wrong. I might be doing something unconventional but if it works I will continue. I try to keep the threads running for a while to hopefully show validity on my observations.
You might be able to share areas in ray keeping which I have no experience in due to my location. I do troll that area but will keep it to myself. Ray keepers spend big dollars on their collection and the last thing they need is for someone with no experience giving them advice. I know it's an open forum.
Most comments on this thread are "nice" or "too fat" which doesn't contribute to learning or elevating the hobby. So I continue to post photos which many are probably tired of.
Love it. I'm 100% onboard with your philosophy of pushing the hobby forward through good information. Seems to be getting harder and harder to find and spread these days with the current state of the internet. Please correct me anywhere I'm wrong - I want to get a basic outline of information to build on first.
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Nitrification Cycle
Fish waste and uneaten food is converted by bacteria and fungi to ammonia. Specific bacteria colony in bio filter consumes this ammonia and converts to nitrite. Another bacteria colony then converts nitrite to nitrate.
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Good bacteria both aerobic & anaerobic will grow and shrink (at different rates) based on the available ammonia then nitrite from bio load. This would lead me to think that a balance in surface area of different bio media types could be needed.
In order to promote anaerobic ammonia/nitrite oxidizer growth - too much oxygen rich K1 or similar could be an issue. Aerobic bacteria consuming all available ammonia/nitrite before anaerobic oxidizers have opportunity to feed and grow.
Balancing this with an increasing bio load (fish growth -> feeding volume increase) is where it can get tricky. Its harder with high metabolism fish like rays or rapid growth/waste producers like catfish. Large water volume can help smooth some things over but not an option for most.
Real Momotaro Bac House media in a shower filter has always sounded like a best of both worlds solution. Claims that it is porous enough to house anaerobic bacteria in shower configuration seems unlikely but I cant confirm or deny. Small K1 chamber followed by submerged jap mat or porous media makes more sense to me. But the oxygen concentration in the chamber following the K1 still feels like it would be too high to promote sustainable anaerobic growth.
As a koi filtration jedi master I know you've seen these types of configurations a lot
. Would love to get a discussion going here with your thoughts.