Originally Posted by cmonicarl
Would it hurt fish or coral to change 50% of the water once in a while with deep sea water instead of water from LFS
What size tank? My concern would be too much of a water change. IMO
that much isn't needed UNLESS conditions call for it.
I do a 5 gallon water change on a 29 gallon cube.
Also if your switching water I'm assuming that would mean salt which would mean possible the amount of trace elements, calcium etc. I'd switch over slowly... over a months time. I tend to be overly cautious but you'd want to make the change slow.