I currently have a 75g freshwater that I am currently redecorating I had a bunch of plants in the tank at one point but they weren't appropriate for the lighting that I have. So I'm going to be adding plants that can tolerate the low wattage lights that I have. I have eco-complete along with regular gravel in the tank right now that has been there since June of 07. Combined the gravel is about four inches deep.
My question is should I add more eco-complete? Or should I maybe think about adding some laterite to the gravel that I have? Or leave it alone?
The other thought I have if you all say to add more eco-complete is, won't it turn the tank completely black or at least grayish and will this hurt the fish?
Thank you in advance for your input.