I have a power compact light, homemade Co2 generator and gravel I have been told that I can use miracle grow to help my plants but I am not sure if it would kill my fish. If you would like to make your own Co2 generator go to youtube
Not a good idea. Miracle Grow is made for terrestrial plants, so it has nitrate and phosphate to promote their growth. In an aquarium, these will promote not only plant growth, but algae growth.
There’s already a source for nitrate and phosphate in your tank. It’s your fish and their wastes. So all your plants really need is a source of things like iron and trace minerals. That’s what the aquatic fertilizers contain [check the labels]. And unless you have high lighting [more than 4-5 watts per gallon] or very demanding plants, you probably don’t absolutely need to have a CO2. If you don’t have it regulated correctly, it can kill your fish too. Remember, they need to breathe O2, and CO2 competes with it because water can only hold so much dissolved gasses. And plants only need the CO2 during the day when undergoing photosynthesis.
ADDED I should also mention that Miracle Grow as in the potting soil/garden soil has peat in it if I remember right, and that will lower the pH in the tank, and leach tannins making your water look brown.