Do I need to do something about it? It's not on every plant. Only a couple. How do you test for phosphates? My test kit only tests for pH, alkalinity, nitrates, & nitrites. Is there a seperate test for phosphates?
Do I need to do something about it? It's not on every plant. Only a couple. How do you test for phosphates? My test kit only tests for pH, alkalinity, nitrates, & nitrites. Is there a seperate test for phosphates?