I am wanting to do a dirted tank with my established 44 Gal Octagon Oceanic. This tank is well established and cycled with fish in it. The tank has been up continuously for 5 years, and the filter that is on it has been in it for 2 years. I use straight well water. It is fairly "Hard" water with alot of calcium and minerals in it.( South Missouri well). My question is about 3 parts. I am planning on using pulverized topsoil that has been tested and is showing no signs of any chemicals in it. I want to cap it with pea gravel. Anyway, how much dirt should I put down, then how much cap over it. Also, if I use my water in the tank now, along with a 40% water change, alsong with my current filter and all, will I be able to restock my tank after putting the new substrate in it, or will I have to cycle it again? Thank you. Here is a picture of it, and the blue gravel in it is going to be coming out when I change the substrate.
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