It's not difficult to install - for a permanent install you just tap into one of your cold water lines. The easiest install though is to get a connector that just screws on your faucet outlet and feeds the unit. Granted, you have to take it on and off to use that faucet (or get a T-connector) but it's pretty easy. The other issue though is storing the RO
water. The units generate water on the order of 50-100 gallons per DAY, so you can't just turn on the faucet and expect enough water to mix up salt just like that.
is surprising... I would've thought it'd be worse. The problem though is that you don't know what kind of chemicals are in it. I just remember when I was in China many years ago, even the bottled "pure" drinking water had the smell of diesel to it. Hopefully things have changed...
But DO bring that temperature up to 78-80 degrees F. Between the temperature and the quick acclimation time (versus drip), that could explain a lot of deaths.
Also agree that you're pushing your stocking limits... but that's not causing your deaths in my opinion.