10-19-2020, 02:26 PM
Join Date: Oct 2020
| | Re: Uptake of (ferric) iron in floating plants
Thank you for the answers
Of course I don't want to fertilize a plant which grows to fast.
I would like to understand more technically what chemical reactions occur in my aquarium.
Let's assume a situation that all previously available iron is depleted from the water column because of Limnobium. Hipothetically I wont make any water changes and only feed my fish. Is it possible in this case that non rooted plants get after some time new FE2+ ions from the water column from fish poop? Is it possible that new Fe3+ ions from fish food are reduced to Fe2+ which is accessible for plants?
This question is important for my situation. I have a microsorum and Limnobium. I don't want to starve microsorum. I prefer to reduce periodically amount of Limnobium and increase fish load to produce more nutrients including iron. I would make it of course only if it would be a reasonable action.
@Hoppy I have found your entries in the following thread: https://www.aquaticplantcentral.com/...lgae-iron.html
A high light tank, with CO2 being added, will cause the plants to grow too fast for the substrate nutrients to supply all that the plants need. So, we dose the water column to keep them growing. This process works somewhat different from lower light tanks. But, the effect of iron in the water, with intense lighting causing iron photoreduction, should be the same. I can't reconcile that with Ms Walstad's theory, knowing that many people do have high light, CO2 dosed tanks with iron being dosed in the water, and which don't have serious algae problems. But, there has to be a way to explain it. Similarly, why does a heavily planted tank discourage algae growth? It cannot just be magic. The physical reactions, and the science behind them, should be consistent whatever light intensity or fertilizing method or substrate we use.
Do we have iron photoreduction or something else in low tech tank, that cause Fe+3 -> Fe+2 reduction?
FE+3 is not accessible for plants at all or with more effort?
Last edited by szkotkr; 10-20-2020 at 12:35 AM..