Need advice on water supply plumbing
I'm working on a new show tank project based around a rimless 57 gallon Oceanic Illuminata tank. Much of it is DIY - an LED array, DIY stand, and some DIY plumbing. It's that last one that I need some advice with.
I've run hot and cold water supply lines in the basement that end just underneath the planned tank location. I can run the lines straight up through the floor into the tank stand. Right now I have stub pipes that end in 1/4 turn valves like the ones that supply a sink or toilet. They end in 3/8 compression fittings.
The tank is drilled for two 1" bulkheads (two 1 3/4" holes in the bottom glass). I'll use one for the filter inflow in the middle of the tank and one for the outflow (redirected through 1/2 PVC to loc-line returns, on each side of the tank.
I'd like to run a canister filter, inline heater, and inline CO2 (through a Boyu diffuser or something similar). My question is how best to plumb the hot and cold water supply into the system. Should I run flexible braided sink-type hoses to barbed fittings that tee into flexible tubing (I'd prefer to use flex tubing if possible)? Is there a really important reason to go with hard plumbing for this purpose?
I can also place the valves below the bottom shelf of the stand (in the space between the shelf and the floor) and just run flex hoses up through the shelf... I see lots of options here, but I'm looking for some wisdom from those who have done it before. Picture attached gives you a sense of what I'm talking about. Among other things, I'm wondering if the 1/4 turn valves will give me enough flow rate control that I can use them to control flow into the tank...or whether I should run hot and cold water to a separate mixer valve and THEN into the tank system...