I'm running 2 carbon filters on the incoming water to the house, and through another carbon after the pressure tank. I replace my RO membrane every year also.Ok... you need to check your RO unit carefully.
If you dont prefilter out iron it can damage the unit.
Perhaps you RO unit is letting some of the iron through into your tank.
I'm on Well water :wavehand:have been reading through this, and I am still a total newbie at this. I am hoping it all works out in the end, and am tagging along to learn more.
I did have a problem with my FW sharks dying off at one point. It ended up being small levels of copper in the water. I started filtering the water and they where fine. After moving (and changing from city water to well water) i have had no problems with my sharks either.
Have you tried calling the water company and asking if they have done anything different to the supply recently???
Gary thanks again. I've had my water tested by a couple other people and they are all within a point or two. I'm going to pull what corals I have and a little rock and setup a temp reef tank and trash all the water and cook the rock from the main system.my thinking is along the lines of Paul's but with everything dying I can't help but think something is seriously wrong.
Personally, I'd rule out Fe, Zn, or Cu as being the culprit.
Fish are dying. Something is goofy. (Palytoxins?)
Triple check salinity using different instruments and have a fellow reefkeeper check it as well.
Do a 100% water change. Better yet- cook the rocks AND do a 100% water change.
There is nothing else I can think of. The dead puffers were not in the water a long time I would imagine. They are poisonous but it is a stretch I know. And I don't think that would affect the corals.
how much is the well water filtered before reaching the aquarium?
has your basement flooded recently?
Your killing me. I ran out of ideas. Still sounds like metal but I guess it may be something else. I am sure your salinity and temp was checked by other means? No forget that, the corals still would not "melt" that fast. I have seen them do that, but only with metals like zinc or copper. I can't think of anything else right now. Sorry