Fertilizer regimes for low/medium light tank - The Planted Tank Forum
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post #1 of 8 (permalink) Old 09-03-2019, 12:09 AM Thread Starter
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Fertilizer regimes for low/medium light tank

Tank is 29 gallons. I’ve been dosing 2ml of excel every day and have added a few root tabs(micros) here and there. The bio load is relatively low at the moment with 8 cherry shrimp and 3 Otos. Once the shrimp reproduce a few times the plan is to add around 15 nano fish (CPDs/Cory hasbrosus) so presumably in about a month or 2. Eco Complete is the substrate. When I set up the tank plant growth really took off but now it seems to be tapering off and the water wisteria looks to be showing some deficiencies (yellowing undergrowth and holes forming in some areas... not sure if it’s a potassium deficiency or hungry shrimp). Green spot algae appears to be settling into the s Repens. My question is Will API Leaf Zone with excel and root tabs be enough to keep the plants lush and healthy or do I need to look into dosing Phosphate and Nitrogen as well? Picture below is how the tank looks now. Would this be considered heavily planted?
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post #2 of 8 (permalink) Old 09-05-2019, 02:57 PM Thread Starter
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The nitrate levels in the tank seem to hover around 10-20ppm so I worry that products like Thrive May push the nitrates up to unsafe levels?
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post #3 of 8 (permalink) Old 09-06-2019, 12:12 AM
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If your nitrates are already hovering around 10 ppm, then there's really no need to dose them (though I'd double check your nitrate levels, since the test kits seem to be a bit unreliable).

You'd still have to dose the other macro and micronutrients, so all-in-ones would not be the best idea, since there is no need to dose the nitrogen component.

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post #4 of 8 (permalink) Old 09-06-2019, 06:19 AM
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Flourish comprehensive at the recommended dose and a very sparing application of root tabs will go a long way to any low-tech setup.
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post #5 of 8 (permalink) Old 09-06-2019, 06:59 AM
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I’d be more worried about why nitrates are that high with almost no bio load. What are phosphates reading?
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post #6 of 8 (permalink) Old 09-07-2019, 01:42 PM Thread Starter
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When my tank had finished cycling I started dosing excel which caused a large portion of ancharis to melt. I ended up removing the plant entirely. This coincided with a large algae bloom. At this point I’ve cleaned the majority of the melted plant up but there may still be some plant debris buried in the substrate. I’ve assumed the elevated nitrate levels have come from that? I don’t think the test kit is to far off because I tested nitrates when I first set up the tank and they read 0.
As for phosphorus i don’t have a test kit for it but I’ve assumed phosphorus is low because all of the algae in the tank has died off except for some green spot algae that has been growing on the tank glass. I’ve read that type of algae thrives in tanks with low phosphorus?
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post #7 of 8 (permalink) Old 09-07-2019, 03:34 PM Thread Starter
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Also I looked up the water quality report for my tap water and it’s says I have .3ppm of iron and the tds reads 82ppm. Will performing a weekly 20% water change supply enough iron for my plants? Nitrates in tap water are around 1-1.3ppm
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post #8 of 8 (permalink) Old 09-07-2019, 04:39 PM
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Quote:
Originally Posted by Everett500 View Post
Also I looked up the water quality report for my tap water and itís says I have .3ppm of iron and the tds reads 82ppm. Will performing a weekly 20% water change supply enough iron for my plants? Nitrates in tap water are around 1-1.3ppm
Not likely, if many plants are growing. Agree with @Jeffww on a good simple fert regimen. And I'm not a fan of Excel in shrimp tanks, seeing as film algae is a big part of their diet.

And just a side note, but when using that nitrate test, shake those bottles really well before using. I too am surprised to see such a reading on a tank with hardly any bioload.

Nothing good happens fast in an ecosystem.
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