@Aquetas my apologies if I sounded harse, but please explain to me how you will benefit from adding fish to your tank to multiply Bacteria ? As more fish will only add more waste to your system, where as more feeding will do exactly the same. Marine bacteria utilize a vast group of elements and compounds to meet their energy and nutrient requirements. Marine bacteria have a special need for sodium. Other major elements required for marine bacteria growth and reproduction include carbon, nitrogen, phosphorous, oxygen, hydrogen, sulfur, potassium, magnesium, calcium, and iron. Common trace element requirements consist of manganese, cobalt, zinc, copper, and molybdenum. Chemical groups fulfilling energy and nutrient needs span an even broader range; inorganic carbon compounds, organic carbon compounds (generally, but not limited to, sugars and amino acids), inorganic & organic nitrogen compounds, organic sulfur compounds, inorganic phosphate compounds, and potassium, magnesium, calcium, and iron salts. Marine bacteria can sequester elements, such as potassium, within their cells at concentrations far in excess of the concentration of the element in their environment. Such sequestration presents the possibility of some degree of elemental depletion in a marine aquarium by bacterial export via protein skimming.
Next time don't assume I act smart.
Like you said this is merely a hobby for you.
For some its a career and for others its a passion.