The Planted Tank Forum banner

learner's question

889 Views 2 Replies 3 Participants Last post by  Darkblade48
ok, so there's marco & mirco supplementation. I read articles saying macro in summary is NPK. But P is Phosphorus, but for EI dosing etc.. they talk Phosphates.?
Why do we use KNO3 (Nitrate), is it thats were we get our N (nitrogen)?
1 - 3 of 3 Posts
Basic chemistry: N is the symbol for nitrogen, O is the symbol for oxygen, P is the symbol for phosphorus, K is the symbol for potassium, H is the symbol for hydrogen. KNO3 is a chemical compound made of one atom of potassium, one atom of nitrogen and 3 atoms of oxygen. KH2PO4 is a chemical compound made of one atom of potassium, 2 atoms of hydrogen, one atom of phosphorous, and 4 atoms of oxygen.

We dose KNO3 for potassium and nitrogen, KH2PO4 for phosphorus. There is potassium in the latter compound, but we dose so little of it, compared to KNO3, that it doesn't provide much potassium.
Plants require nitrogen and phosphorus, as mentioned. They get it in the form of nitrates and phosphates, respectively.

You would not have much luck injecting gaseous nitrogen into your aquarium, nor would you have much luck placing phosphorus (red allotrope only please!) into your aquarium.
1 - 3 of 3 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.