Planted Tank Guru
Join Date: Nov 2009
Location: Missouri united states
Is the ammonia from organic matter in soils that plants much prefer over nitrogen however,too much light for too long, combined with too little plant mass to assimilate the ammonia,and is prime condition for Algae.(along with possibly too little available CO2 /nutrients for light energy being used)
Many have used Miracle grow in planted tanks myself included.
Would always try and get as many plants as I could to begin with and weekly water change should help keep ammonia levels in check.