This form of Iron (DTPA) is a necessary part of the trace element mix as it is very important for plant health in aquatic plants.
It is essential for chlorophyll production and lignin development for plants grown in both acidic and alkaline waters.
INSTRUCTION: Dosage rate for 100L Tank
SHAKE WELL BEFORE USE
Use 1 pump (2ml) per 100L, 3x per week with 50% weekly water change.
• For HIGH LIGHT tanks with injected CO2, dense plant mass and good flow - instead use 3 pumps per 100L, 3x per week (maximum dosage) with 50% weekly water change.
• For LOW LIGHT tanks, dose the normal amount but only 1-2 times per week.
*Amounts above are for reference only. Your planted aquarium may need more or less depending on many factors
WARNING: 3 PUMPS PER 100L IS THE MAXIMUM DOSAGE. DO NOT OVERDOSE
EDTA vs DTPA vs EDDHA Iron.
Fe-EDTA which is commonly available in Bunnings/Garden shops etc is very "easy" and rapid for plant uptake, but the trade off is that it does not last long in the water column solution.. this iron chelate is stable at pH below 6.0. Above pH of 6.5, nearly 50% of the iron is unavailable,therefore this chelate is ineffective in alkaline environment.This chelate also has high affinity to calcium, so it is advised not to use it in calcium-rich soils or water.
Fe-DTPA ( LCA Product ) - It takes a bit more energy, but last several days, so the Fe is available to the plant longer, this iron chelate is stable in pH levels of up to 7.5, and is not as susceptible to iron replacement by calcium.
Fe-EDDHA - this chelate is stable at pH levels as high as 11.0, but it is also the most expensive iron chelate available.
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