I am looking at doing my first liquid cooling build and I wanted to know if my basic build idea was sound. I am looking at using a ThermalTake Tower 900 Snow Edition as the case and going with a 400mm Dual Helix reservoir mounted on the left side. I am planning on using distilled water and 1 or 2 kill coils. Is a coolant strictly needed, or will distilled water and kill coils work? I may add a second 400mm Dual Helix reservoir on the right side at a later date. I would then split the system into 2 loops, one for the CPU and one for the GPU. My biggest concern is will the reservoir fit, If needed I can switch to a 250mm but would prefer the 400mm. Any advice would be greatly appreciated. Below is my build currently.
https://pcpartpicker.com/list/r2w8VY
https://pcpartpicker.com/list/r2w8VY