just a little tip that may save you some money:
RO/DI water isnt really needed in freshwater fish. Depending on the quality of the tap water you have, it could be good enough for your fish. I have 5 fish tanks running atm, and i dont even dechlorinate the water. Ive never had issues with water quality.

you only need RO/DI water when dealing with real delicate saltwater corals.

I'll try to take some pics of my fish soon. I have a 11" Black Piranha, a 12" red devil, a 9" Flowerhorn, and various smaller fish in my other 2 tanks