11-07-2020, 06:54 AM
Join Date: Apr 2005
Location: Brentwood, CA, USA
iTrader Positive Rating: 100%
| | Re: Are deep sand beds bad or good?
First, welcome to APC! Our rules are pretty simple, so as long as you are writing about aquariums, fish, water and aquatic plants you are not likely to stumble over any rule.
The El Natural aquarium is different from other methods, because it puts organic "stuff" in the substrate, where it does things that plain sand cannot do. That causes it it have limits on how deep the substrate can be and still work right. But, if you have inert materials like sand/gravel, grit blasting mediums, floor sweeping materials, cat litter box material, or sand-like materials made for aquarium substrate, the depth of that material can be several inches without causing problems. I doubt that having more than 2 or 3 inches of inert substrate is an advantage, other than making the aquascape look good.
An aquarium without living plants does need to have the nitrate concentration, from fish waste, monitored and reduced regularly. But, the aquariums all of us have, have growing plants in them, and those plants need nitrates (or ammonia) as food for the plants. The plants keep the water from ever having excessive nitrates.