JCO, for ratios etc.
My system is small currently 300 gallon fish tank with a stocking of 30 fish. This is filtered by 100 gallons of pea gravel grow beds. So a very low stocking density of 1 fish per 10 gallons of water. I'm emagining stocking 1 fish per 3 gallons would not be too crowed for the Yellow Perch, they keep together most of the time as it is. Currently seeking Orgainc Certification and expanding so that each node will be a 300 gallon fish tank housing 100 YP's with 600 gallons of pea gravel grow beds.