I am looking to update my betta's tank from a 5.5 gallon tank with silk plants to a 15 gallon planted tank. I have been reading a lot about how to care for plants and have gotten contradicting answers. For starters, would using a plant substrate eliminate the need for root tabs and liquid fertalizers? My tap water comes from a well, so it probably has minerals and the like in it already. I read that you do not want to over fertalize. Also, what works best, flourish excel or DIY CO2. Thank you.