I have noticed that when cow manure is added to a pond, the water goes green or green/brown suggesting the growth of
organisms such as cyanobacteria, chrysophytes, cryptophytes and euglenoids, it doesn’t look like water mould.
I find this strange becuase if I add the ingredients of cow manure (ammonium, phosphate, potassium, calcium, magnesium, trace metals and amino acids) to some water, after about two days I have a load of what looks like water mould i.e. the water is orange or grey.
What is it in cow manure which inhibits the growth of water moulds?
(I should point out that I only get the water mould if I include amino acids, but cow manure apparently contains those).
Thanks in advance.
Shaun.