Iron question - The Planted Tank Forum
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post #1 of 4 (permalink) Old 06-02-2014, 01:26 AM Thread Starter
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Iron question

So I have a 25 gallon moderately stocked and moderately planted tank. I keep nitrates at 20ppm phosphates at 1ppm. I dose flourish comp twice weekly at the recommended dose. Lighting is dual t5ho 31 watts per bulb. Tank is co2 injected and maintained at roughly 30ppm with a drop checker. Plants are growing like crazy and things are going well considering this is my first planted tank. I have noticed that there is some interveinal chlorosis on some of the younger leaves. I do use equilibrium at water changes because we have really soft water with almost no calcium or magnesium. Is this an iron deficiency or something else? Manganese deficiency? I can't quite pinpoint which nutrient I'm short on. Any suggestions?
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post #2 of 4 (permalink) Old 06-02-2014, 04:40 AM
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Since excess nutrients cause no adverse effects, you can dose per the tables in and you won't need to be concerned about nutrient deficiencies. You will need to do big water changes regularly, like 50% of the water once a week. This prevents any excess nutrients from building up in the water and finally getting high enough to cause problems.

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post #3 of 4 (permalink) Old 06-02-2014, 11:01 AM Thread Starter
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Thanks Hoppy I will give that a try and see what happens.
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post #4 of 4 (permalink) Old 06-02-2014, 12:08 PM
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Photos of the problem?

Sounds like iron deficiency. It is quite common in aquatic plants. Look through the various iron deficient plants here:

Here is a summary on Mn deficiency/toxicity:

While EI guidelines are built around acceptable nutrient ranges adding too many micros can cause toxicities while more macros generally cause no problems at all even at very high levels.
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