PH Drop fish look ill.

[remy1290]

My tank suddenly dropped PH my fish all are looking to be sick now and not doing well along with corals. I did a 25% water change yesterday they were fine until today around noon suddenly started acting off. Here’s my tang and damsel looking sick. Blenny breathing hard as well… I want to save this issue ASAP any help is appreciated thank you

 

[Reefer Matt Verified Media Partner]

#fishmedic

 

[Cali Reef Life]

Check you ammonia levels or nitrite and make sure there getting enough gas exchange oxygen are 2 common causes of PH dropping.

 

[Jay Hemdal Verified Community Expert]

My tank suddenly dropped PH my fish all are looking to be sick now and not doing well along with corals. I did a 25% water change yesterday they were fine until today around noon suddenly started acting off. Here’s my tang and damsel looking sick. Blenny breathing hard as well… I want to save this issue ASAP any help is appreciated thank you

How low did the pH go? It might be coincidental to these skin lesions, can you post pics taken under whiter light? Sometimes a short video is clearer….
Jay