Hi All. At last I am ready to change over my substrate from gravel and put plant friendly substrate in its place. I purchased two bags of Flourite Black. When they came I realized I would need 2 more bags. Accidentally I bought 2 bags of Eco-Complete Black instead. Here’s my question. May I/is it recommended for me to combine the different substrates in my tank? If so: 1) Is there a recommended way for how I should do it? (I.e. literally mix them together, put all of one on the bottom and the other on top, do a bottom layer of one, two middle layers of the 2nd, and a top layer of the original?) 2) Any other suggestions? My initial reaction was to return the Eco-Complete and just buy more Flourite. BUT, I planned to do this change tomorrow morning. Replacement Flourite won’t come in time and my research says Eco-Complete is also a good substrate. Thank you all, in advance, for your help.