That is far too much food, it's not being eaten and dirtying the water. I suggest you look into a high-quality pellet such as New Life Spectrum (NLS) and do as large of a water change as your gravel vac will allow. It is not necessary but a bottle of Tetra Safe Start could help you. I suggest you stop feeding for now while we get the water under control (fish can go months without food, don't worry) and you get a quality pellet. Most of us have been down this road and we are here to help!