05-14-2010, 01:30 PM
Join Date: Sep 2009
| | Re: How-To: Mineralized Soil Substrate, by Aaron Talbot
Originally Posted by cheddar254
great post! very useful! going to be using it soon! i would just like to ask some questions please!
at step 6 when putting the gravel over the mud wouldnt some of the gravel sink into the mud? thus causing a mixture thing?
and as for adding the clay? is there any sort of specific clay you must use or any?
I used pottery clay, the red stuff. I am not sure if the other clays have lotsa iron, but I can attest that I have great growth and have never dosed iron in my mineralized topsoil tank. Therefore, one can conclude that red clay has iron. You could probably find some at an art supply store, if there is one in your area.
Adding sand overtop is fine. I don't think it matters what kind, but allegedly playsand is more lightweight than other sand so it's less likely to sink. I didn't have enough sand, so some of the soil was exposed to open water. All that happened was the tank was cloudy for a few weeks. A couple water changes and filter cleanings and it is all good.