All your water is treated with ro/di? Drinking,and washing? That must be one heck of a system. Maybe you should pick up a small system just for emergencies. It'll cost you a couple hundred bucks but would probably be cheapest in the long run. Trips to town are expensive. On the bright side you can get ro/di in your town unlike mine.

Good luck with it.

PS I'm playing with my lights as I type this. Think I found the problem.

Why would the sodium be a problem?? So will and r/o system remove the iron??

Sodium is bad for your health if you drink alot of water. Really makes the coffee taste bad, makes fizzy lemonade and kills houseplants.

So will and r/o system remove the iron?? - not understanding

No I mean why would sodium be bad for your fish tank?? and you also mentioned iron.. do r/o systems remove iron??

They do remove iron and sodium.

My well water passed through a large main line filter. Then to the water softener and then the ro, for the tank, drinking and fridge/icemaker water.

BUT !!!!! Here the mistake I made which led to down sizing and selling my 225g. The ro does not remove any excessive alkalinity. DUH ! I never knew that, kind of naive I guess about ro units. Got spoiled in Thompson with our good water. :lol:

Took me forever to figure our what kept screwing up my alk. and preventing me from keeping sps corals. Here all I needed was a DI on the backend of my ro unit. Geez, now someone tells me. :lol:

So thats my advice for filtration of well water and the only way I would ever use it for my systems. FWIW, of course. :lol:

SO as long as your using an r/o well water should be fine??

RODI.

Plus remember, without a softener, hard cold well water is very hard on membranes.