Planted Tank Enthusiast
Join Date: Apr 2011
Location: Pasadena, california
out is usually some modified form of in...
all of the reading i have done indicates that Fish poo, whether it is their diet or not, is notably lacking mainly in Potassium, iron, magnesium, manganese and calcium, any of which can cause plant nutrient defficiencies, but moss will probably be ok. other defficiencies are probably linked highly to diet, but everything I've read says the same thing about the notable lacking parts regardless of diet. Obviously I do not have my own expensive lab to confirm.
remember, trimming and removing plants from the system is a nutrient export
changing the water is a nutrient export
topping off, with anything other than RO water is a nutrient import.
food is a nutrient import
dosing is a nutrient import
decomposing organics is nutrient recapture/conversion