Well I started with Discus and my 55 gallon isn't going to last that long .So I'm in the hunt for a 125. I really can't afford to use ADA soil so from what I have read that MTS is the next best thing. The only worry that I have is that I like to have soft water plants like Syngonanthus sp.“Belém” and Eriocaulaceae type 3. Will that soil be ok with the plants. Here is my shopping list (6) 55 watt ah supply lights 28 inches off the bottom (2) Eheim 2075 with the spray bars on each side with Atomic Diffusers with there own dedicated needle valve. RO/DI water with Greenleaf Ultimate GH Booster so the water gets it's nutrients back in. (2) Hydro 300watt heaters (2) Co2 checkers on each side of the tank.