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-   -   How-To: Mineralized Soil Substrate, by Aaron Talbot (https://www.aquaticplantcentral.com/forumapc/apc-library/52554-how-mineralized-soil-substrate-aaron-talbot.html)

GadgetGirl 11-24-2020 04:49 PM

Re: How-To: Mineralized Soil Substrate, by Aaron Talbot
 
It would probably be ok, but I'm not sure what would be gained if it's mixed in substrate.

Latka 11-24-2020 07:14 PM

Re: How-To: Mineralized Soil Substrate, by Aaron Talbot
 
Quote:

Originally Posted by GadgetGirl (Post 1012511)
It would probably be ok, but I'm not sure what would be gained if it's mixed in substrate.

Clay mixed in the substrate promotes plant growth by increasing the cation exchange capacity (CEC) of the soil, helping roots to efficiently utilize soil nutrients.

Quote:

Originally Posted by AaronT (Post 393340)
There are a few other components to the mineralized soil recipe. Clay provides a source of iron. The clay also serves to bind with the soil as a flocculating agent. When plants are uprooted or disturbed, the added clay will help the soil to settle back to the bottom of the tank.

I'm still not sure about the sodium vs. calcium question, though.

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vloeien 02-08-2021 08:25 PM

Re: How-To: Mineralized Soil Substrate, by Aaron Talbot
 
Does anyone here keep invertebrates? I've given this recipe a go and it appears to have created a toxic environment for my shrimp and nerite snails. Several batches have died, even after isolating one variable after another. Meanwhile, I'm keeping another dirted tank, utilizing the same tap water and many of the same plants, with zero issues.

I raised this issue on the El Natural forum, and Diana Walstad mentioned: "Many clays contain aluminum. The clay may be fine by itself, but when you mix it with an organic soil, the organic matter can solubilize the aluminum oxides and release toxic aluminum into the water. Invertebrates are particularly sensitive to heavy metals, which includes aluminum." She also was concerned about using solid potash.

I've spoken with two others who have used this mineralization method and cannot keep invertebrates in those tanks, despite being able to keep them in other tanks. It seems quite likely that something toxic is being leached from the soil substrate.

I'm very curious if anyone else has experienced an issue like this using the mineralization method suggested in this post.


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