How to tell if I need to dose macro-nutrients ?
I just setup a new 28G planted tank 4 days ago. Some bacteria have started forming on the filter media as I seeded it with my old filter gunk and new bacterial culture. I also have fish in the new tank (transferred from my old one). Started injecting CO2 about 32 hrs ago, and have dosed Seachem Flourish Comprehensive twice so far. Once on day 1, and once this morning. 2.5ml each time. I have also inserted fertilizers into the substrate.
CO2 levels are about 30ppm based on my drop checker. Lighting is 2.5WPG T5, 12 hrs per day. Plants that are not rooted in the substrate (i.e. planted on driftwood) have started shedding and melting leaves. One of them is an Anubias Nana, the other is some kind of pennywort.
Iíve read that this is normal with new plants Ė something about submerged and emerged growth? How long should I wait and see before taking action?
Iím also unsure about nitrates and phosphates. Some sources say that fish food and fish waste would provide sufficient macro nutrients for plants. In addition, there are also nitrates and phosphates in Flourish Comprehensive. How do I tell if I need to dose more nitrates and phosphates or if I need more light/CO2?