Originally Posted by Thoth
I have never done a full planted tank before and this is the first time that I have heard of people using potting soil as a substrate in a aquarium tank; have not read the entire article you linked. The MiracleGro Organic has chicken litter in it, which I would think would cause some major problems for a tank. Why not just buy peat moss, which is the main ingredient along with composted bark mulch, and skip the major nitrogen source (poultry litter)?
Just a thought..
i second this i myself have nearly 1.5 inch of aquatic peat under my gravel
it serves two purposes one to lower the ph and two is of corse aid plant growth
for starters potting soil has metals in it that you do not want your fish to breath
nitrogen is in potting soil also not good in any amounts
DO NOT USE POTTING OR ANY OTHER SOIL OR FERTILIZER
find a good aquatic/organic peat and use that have barely any at the front and about an inch at the back
not only will it lower the ph but also it's a good fertilizer
if you can't find aquatic peat then use something like pond compost
and then cover with your gravel