ammonia in established tank

[Rogersstuff]

My son has a 200 gallon tank and have had issuses with things dying fish and corals. OnFebuary 20 I tested for ammonia and nitrite and found ammonia .34 nitrite 32
did a 45 gallon water change. on 2/26 ammonia .09 nitrite 28. did 45 gallon water change . On March 2 ammonia .32 nitrite 20. Help what do I do? I can only make 50 gallons of salt mixed water at a time.

 

[Randy Holmes-Farley Verified Community Expert]

Neither of those are killing fish, but may be from dead fish in the water.

I'd look for other causes, notably disease.

This shows that ammonia needs to be far higher to kill, and nitrite also.

https://www.reef2reef.com/ams/ammonia-is-our-friend.1062/
Nitrite and the Reef Aquarium by Randy Holmes-Farley - Reefkeeping.com

 

[Rogersstuff]

Thankyou i am going to send out a ice test to check everything. Just haveing a hard time getting anything new in the tank.