Hokay, so I redid the tank. I removed all the live plants and remove most of the gravel so I could add the fake ones. Ouch! But it's the only way. It was really murky! The water has been like from a swamp! I was really worried that the fish may die. Luckily, it all settled down now and it's crystal clear again. I'm gonna partially 'redo' some more... like tomorrow, syphon out a part of the tank and remove most of the the gravel at that zone... and so on until I finish the tank. That should be really hard but that's what I'm gonna do.
So is my plan ok? Any suggestion?