Rummy nose dying after water change.

aebm
Member
Hello group,
I'm glad to find this nice forum.
Ok, I had a very healthy school of 9 rummy nose and 2 cardinal, yesterday I made a 20 or 25% water change using ro water.
Today I woke up to see 3 dead of the 9 and the rest slow moving and some heading vertical towards the sand.

I only could read for PH and it shows 7.5, temp is 78, What did I do wrong?
They were all very active and growing.
Tank is cycled from a couple of months ago.

Any help will be greatly appreciated.
 
Fish tile
Member
jamesonuk
Member
Any issues during previous water changes? Do you know what the pH was before?
 
ilexopaca
Member
I would definitely recommend checking your other water parameters, especially if this was right after a water change. If you can't do it at home, you can always take a sample to your local fish store and most will test it for you.
 
Herkimur
Member
You put electrolytes back in after RO water?
 
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