Sorry for getting so defensive yesterday... You know how it is when you put your ideas/plans out there.
Thank you for the sunfish culture guide link, I will read that today. The information about the HVAC filter containing flame retardant chemicals is also appreciated. I knew there was a possibility that the filter would contain anti-fungals/anti-microbials however I had not considered more volatile/harmful additives that might still be left after several dish soap soaking/rinsing cycles.
It appears that we have the same opinion of the screen pre-filters. They are nice but way too expensive. I've found 200 micron nylon mesh for cheap but unlike the more rigid stainless steel mesh, it would have to be supported with pllexiglass rails or something similar. I'm still working it out but, if it can be done for reasonably cheap, I'd really like to be able to strip out the larger solids before it goes to the clarifier.
I also wanted to let you know that I am doing this purely for fun and it is just a hobby, I have no illusions about turning a profit with this little experiment.
