Aquasoil that has absorbed toxic amounts of micros - The Planted Tank Forum
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post #1 of 4 (permalink) Old 06-22-2016, 03:20 PM Thread Starter
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Aquasoil that has absorbed toxic amounts of micros

I used to dose micros quite heavily and didn't water change as often as i should have. Long story short i believe my aquasoil has absorbed too much micros and it is affecting the growth of my plants negatively.

The question i pose to those who may have run into this issue or know their chemistry, will simply washing aquasoil be worth the effort in reducing the high levels of micros that it may have absorbed?

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post #2 of 4 (permalink) Old 06-22-2016, 04:02 PM
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I would try soaking it in some r/o water.
Changing it and repeating every couple days with a circulation pump.
H2o is highly reactive and should pull out quite a bit.

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post #3 of 4 (permalink) Old 06-23-2016, 04:13 PM
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I doubt that trace elements in the Aquasoil is your problem. Aquasoil can run short on some nutrients, starting with potassium, within a year or so. Amano recommended replacing the Aquasoil every year, as I recall from one of his articles. Also, the ADA recommendation was to add potassium fertilizing almost from the start of using Aquasoil.

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post #4 of 4 (permalink) Old 06-23-2016, 04:46 PM
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I agree with Hoppy. The trace toxicity hypothesis (at levels found in aquariums) has not provided any concrete proof and no concrete observable outcomes. It was just thought process speculation, hunting for correlations and insufficient knowledge of toxicology. I have seen some members stopping trace dosing and after about 2 weeks plants were showing growth problems. Who would have though???

While there is a certain "leaking" of nutrients from the substrate it is very slow. If the substrate became toxic to plants you expect to see all the roots burnt up, plants melting and detaching (trying to move to a safer spot). With say daily or 2-3x weekly water changes , you could even see plants that are not in the substrate growing fine while nothing grows roots in the substrate. Is this your experience ?

My understanding is that you can remove whatever got caught up due to CEC with a high H+ conc. solution. So in theory if you submerge the soil in a (strong) acid all will be replaced with H+. Is it worth the work and the risks , no.

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