Hello All,
I've just started to setup my new tank. I'm a fan of American Chiclids. I've and probably i'll have lots of questions about my new setup. Hope you'll all help me about that new setup.
I already bought about 24kg's of gravel but they're about 2-3mm to 3-4 cm.

1-Would it be convinient for American cichlids? (I'm deciding to add golden severum and firemouth to the tank.)
2-Do you think that it looks natural? What colour/type of rock you can recommend for that floor? Any pictures that can give me an inspiration?
Background.
I'm deciding to have a black background. Which option would be best? To paint? To cover? Which material?
Plant/ Lighting Recommendation
1-I've 18w setup. Would one daylight flo enough or should i upgrade my system? Actually i'd like to have a natural lighting as much as possible and i really like mysterious lightings. Can you recommend any article about it?
2-I'm afraid that severums will like to eat most of the live plants but what about amazonian sword or java fern? Will they grow up with that kind of poor lighting and that kind of gravel ground?
Decoration
1-Which wood option would be best for severum and firemouth community? Would it look natural with that gravel ground? Any aquascaping ideas?
2-Do they need any type of caves or kinda pots etc?
Thank you so much for all of your ideas and sorry for my Eng mistakes. I hope it's understendable.
I've just started to setup my new tank. I'm a fan of American Chiclids. I've and probably i'll have lots of questions about my new setup. Hope you'll all help me about that new setup.
I already bought about 24kg's of gravel but they're about 2-3mm to 3-4 cm.

1-Would it be convinient for American cichlids? (I'm deciding to add golden severum and firemouth to the tank.)
2-Do you think that it looks natural? What colour/type of rock you can recommend for that floor? Any pictures that can give me an inspiration?
Background.
I'm deciding to have a black background. Which option would be best? To paint? To cover? Which material?
Plant/ Lighting Recommendation
1-I've 18w setup. Would one daylight flo enough or should i upgrade my system? Actually i'd like to have a natural lighting as much as possible and i really like mysterious lightings. Can you recommend any article about it?
2-I'm afraid that severums will like to eat most of the live plants but what about amazonian sword or java fern? Will they grow up with that kind of poor lighting and that kind of gravel ground?
Decoration
1-Which wood option would be best for severum and firemouth community? Would it look natural with that gravel ground? Any aquascaping ideas?
2-Do they need any type of caves or kinda pots etc?
Thank you so much for all of your ideas and sorry for my Eng mistakes. I hope it's understendable.