I would be interested in seeing the black diamond blasting sand analysis since I am considering putting that in my tank. Also what is the current market cost for performing these tests?
Bump: I would be interested in seeing the black diamond blasting sand analysis since I am considering putting that in my tank. Also what is the current market cost for performing these tests?
Blasting sand would be <1 meq/100g so a very very poor rating. Organic matter and true clay particles would bring CEC up the most. While sand and silt particles would bring the CEC rating down.
The issue when applying a high/medium/low rating of CEC to aquarium substrates is that the true surface area is a fraction of what a traditional soil would be.
For example with the same volume of a traditional clay soil vs aquarium substrate, the clay soil would have immensely more true surface area, more organic matter and therefore a much, much higher CEC. Even true sandy soils have a CEC of ~3 meq/100g where as in the above chart play sand got a 0.1 ...
Now that Iíve seen some data, I honestly think CEC in aquaria should be disregarded... sands/fluorites/ecocompletes have very low ratings, aquasoil should have a decent rating, but unless we are using true sand/silt/clay soils (some are, ex: digging up some dirt from your back yard for aquarium use), or organic soils, then CEC in the planted tank is insignificant.
But, we still have the issue many talk about.... running your dirted tank out of juice. Organic matter contributes the greatest to CEC, so if we fertilize can we take advantage of the CEC? Maybe... but without taking samples we canít be sure. Maybe organic potting soil is just that, 100% organic matter that will decompose not into a soil, but into organic compounds lost to leaching/uptake by plants and microbes, makes me wonder if grabbing a shovel and putting my work boots on is a better route to a great planted tank substrate than most of us take.
Of course this is all hypothetical, we have all seen great tanks regardless of the substrate used. Overthinking at its best
Oh! Almost forgot, I canít tell you my companyís pricing for competitive purposes, but a $10 bill wonít buy you a sample, a $20 bill will
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