Hello everyone. My wife and I are starting a new 90 gallon discus tank. We both know what we are looking for in setting the tank up but is how to go about it and if it is the right thing to do is the question... Our plan is to have a planted tank with refugium filter system or standard wet dry filter,3d background to make this tank look as natural as possible. The questions we have are what type of lighting, best filtration and co2 system??? Is it absolutely necessary to have co2 for planted tanks? We have had success with keeping discus and have had breeding pairs... Although we don't know a thing about planted aquariums.... Any help would be great!!!!