05-27-2020, 07:32 PM
Join Date: Apr 2005
Location: Brentwood, CA, USA
iTrader Positive Rating: 100%
| | Re: Using less than 1" of soil
I don't think the depth of soil/gravel is critical. It can be too much and it can be too little, but the happy middle is pretty wide. I'm basing this on the lack of a lot of threads being started about problems which are caused by too much or too little substrate. I know I have had a wide variety of substrate depths, and only rarely had any plant problems with any of them. Also, when I tear down an aquarium I only get the HS smell when I mistakenly put a big rock or piece of wood on top of the substrate. But my experience doesn't include much of the El Natural method.